Justice Breyer
delivered the opinion of the Court.
The federal officer removal statute permits a defendant to remove to federal court a state-court action brought against the
“United States or any agency thereof or any officer (or any person acting under that officer) of the United States or of any agency thereof, sued in an official or individual capacity for any act under color of such office ....” 28 U. S. C. § 1442(a)(1) (emphasis added).
The question before us is whether the fact that a federal regulatory agency directs, supervises, and monitors a company’s activities in considerable detail brings that company within the scope of the italicized language (“acting under” an “officer” of the United States) and thereby permits removal. We hold that it does not.
I
Lisa Watson and Loretta Lawson, the petitioners, filed a civil lawsuit in Arkansas state court claiming that the Philip Morris Companies, the respondents, violated state laws prohibiting unfair and deceptive business practices. The complaint focuses upon advertisements and packaging that describe certain Philip Morris brand cigarettes (Marlboro and Cambridge Lights) as “light,” a term indicating lower tar and nicotine levels than those present in other cigarettes. More specifically, the complaint refers to the design and performance of Philip Morris cigarettes that are tested in accordance with the Cambridge Filter Method, a method that “the tobacco industry [uses] to ‘measure’ tar and nicotine levels in cigarettes.” App. to Pet. for Cert. 63a-64a. The complaint charges that Philip Morris “manipulat[ed] the design” of its cigarettes, and “[e]mploy[ed] techniques that” would cause its cigarettes “to register lower levels of tar and nicotine on [the Cambridge Filter Method] than would be delivered to the consumers of the product.” Id., at 63a-65a. The complaint adds that the Philip Morris cigarettes delivered “greater amounts óf tar and nicotine when smoked under actual conditions” than the adjective “ ‘light’ ” as used in its advertising indicates. Id., at 65a. In view of these and other related practices, the complaint concludes that Philip Morris’ behavior was “deceptive and misleading” under Arkansas law. Id., at 64a, 66a.
Philip Morris, referring to the federal officer removal statute, removed the case to Federal District Court. That court, in turn, held that the statute authorized the removal. The court wrote that the complaint attacked Philip Morris’ use of the Government’s method of testing cigarettes. For this reason (and others), it held that the petitioners had sued Philip Morris for “act[s]” taken “under” the Federal Trade Commission (FTC), a federal agency (staffed by federal “officer[s]”).
The District Court certified the question for interlocutory review. And the United States Court of Appeals for the Eighth Circuit affirmed. Like the District Court, it emphasized the FTC’s detailed supervision of the cigarette testing process. It also cited lower court cases permitting removal by heavily supervised Government contractors. See 420 F. 3d 852, 857 (2005); Winters v. Diamond Shamrock Chemical Co., 149 F. 3d 387 (CA5 1998) (authorizing removal of a tort suit against private defense contractors that manufactured Agent Orange). The Eighth Circuit concluded that Philip Morris was “acting under” federal “officer[s],” namely, the FTC, with respect to the challenged conduct. 420 F. 3d, at 854.
We granted certiorari. 549 U. S. 1162 (2007). And we now reverse the Eighth Circuit’s determination.
II
The federal statute permits removal only if Philip Morris, in carrying out the “act[s]” that are the subject of the petitioners’ complaint, was “acting under” any “agency” or “officer” of “the United States.” 28 U. S. C. § 1442(a)(1). The words “acting under” are broad, and this Court has made clear that the statute must be “liberally construed.” Colorado v. Symes, 286 U. S. 510, 517 (1932); see Arizona v. Manypenny, 451 U. S. 232, 242 (1981); Willingham v. Morgan, 395 U. S. 402, 406-407 (1969). But broad language is not limitless. And a liberal construction nonetheless can find limits in a text’s language, context, history, and purposes.
Beginning with history, we note that Congress enacted the original federal officer removal statute near the end of the War of 1812, a war that was not popular in New England. See id., at 405. Indeed, shipowners from that region filed many state-court claims against federal customs officials charged with enforcing a trade embargo with England. See Wiecek, The Reconstruction of Federal Judicial Power, 1863-1875, 13 Am. J. Legal Hist. 333, 337 (1969). Congress responded with a provision that permitted federal customs officers and “any other person aiding or assisting” those officers to remove a case filed, against them “in any state court” to federal court. Customs Act of 1815, ch. 31, §8, 3 Stat. 198 (emphasis added). This initial removal statute was “[o]bviously ... an attempt to protect federal officers from interference by hostile state courts.” Willingham, 395 U. S., at 405.
In the early 1830’s, South Carolina passed a Nullification Act declaring federal tariff laws unconstitutional and authorizing prosecution of the federal agents who collected the tariffs. See ibid. Congress then enacted a new statute that permitted “any officer of the United States, or other person,” to remove to federal court a lawsuit filed against the officer “for or on account of any act done under the revenue laws of the United States.” Act of Mar. 2, 1833, ch. 57, § 3, 4 Stat. 633 (emphasis added). As Senator Daniel Webster explained at the time, where state courts might prove hostile to federal law, and hence to those who enforced that law, the removal statute would “give a chance to the [federal] officer to defend himself where the authority of the law was recognised.” 9 Cong. Deb. 461 (1833).
Soon after the Civil War, Congress enacted yet another officer removal statute, permitting removal of a suit against any revenue officer “on account of any act done under color of his office” by the revenue officer and “any person acting under or by authority of any such officer.” Act of July 13, 1866, ch. 184, § 67,14 Stat. 171 (emphasis added). Elsewhere the statute restricted these latter persons to those engaged in acts “for the collection of taxes.” § 67, id., at 172.
In 1948, Congress again revised the statute, dropping its limitation to the revenue context. And it included thé rewritten statute within its 1948 recodification. See Act of June 25, 1948, ch. 646, § 1442(a), 62 Stat. 938, 28 U.S.C. § 1442(a). It is this version of the statute that, with the exception of a modification in response to this Court’s decision in International Primate Protection League v. Administrators of Tulane Ed. Fund, 500 U. S. 72 (1991), is now before us. While Congress expanded the statute’s coverage to include all federal officers, it nowhere indicated any intent to change the scope of words, such as “acting under,” that described the triggering relationship between a private entity and a federal officer.
Turning to precedent, we point to three cases, all involving illegal liquor, which help to illustrate the need for, and the workings of, the pre-1948 removal statutes. In 1878, a federal revenue officer, James Davis, raided an illegal distillery in Tennessee; was ambushed by several armed men; returned the ambushers’ gunfire; and shot one of his attackers dead. See Tennessee v. Davis, 100 U. S. 257, 261 (1880). Tennessee indicted Davis for murder. The Court held that the statute permitted Davis to remove the case to federal court, reasoning that the Federal Government “can act only through its officers and agents, and they must aet within the States.” Id., at 263. Removal, the Court found, would help to prevent hostile States from “paralyz[ing]” the Federal Government and its initiatives. Ibid.
About the same time, a U. S. Army corporal (also called Davis, Lemuel Davis) along with several other soldiers helped a federal revenue officer try to arrest a distiller for violating the internal-revenue laws. The soldiers surrounded the house; the distiller escaped through a hole in a side wall; Corporal Davis shot the suspect; and South Carolina indicted Davis for murder. Davis removed the case, and this Court upheld the removal. The Court acknowledged that, although Davis was not a revenue officer, he was a person “who lawfully assist[ed]” a revenue officer “in the performance of his official duty.” Davis v. South Carolina, 107 U. S. 597, 600 (1883).
In the 1920’s, Maryland charged a group of prohibition agents and a private person acting as their driver with a murder committed during a distillery raid. See Maryland v. Soper (No. 1), 270 U. S. 9 (1926). The prohibition agents and their driver sought to remove the state murder trial to federal court. This Court ultimately rejected their removal efforts for reasons not relevant here. But in doing so it pointed out that the private person acting “as a chauffeur ‘and helper to the four officers under their orders and . . . direction” had “the same right to the benefit of” the removal provision as did the federal agents. Id., at 30.
Apart from demonstrating the dangers associated with working in the illegal alcohol business, these three cases—Tennessee v. Davis, Davis v. South Carolina, and Maryland v. Soper—illustrate that the removal statute’s “basic” purpose is to protect the Federal Government from the interference with its “operations” that would ensue were a State able, for example, to “arres[t]” and bring “to trial in a State cour[t] for an alleged offense against the law of the State,” “officers and agents” of the Federal Government “acting... within the scope of their authority.” Willingham, 395 U. S., at 406 (internal quotation marks omitted). See also ibid. (noting that the “purpose” of the statute “is not hard to discern”). State-court proceedings may reflect “local prejudice” against unpopular federal laws or federal officials. Soper, supra, at 32; see Manypenny, 451 U. S., at 242 (noting that removal permits trials to occur free from “local . . . prejudice”). In addition, States hostile to the Federal Government may impede through delay federal revenue collection or the enforcement of other federal law. See Tennessee v. Davis, supra, at 263; cf. Findley v. Satterfield, 9 F. Cas. 67, 68 (No. 4,792) (CC ND Ga. 1877). And States may deprive federal officials of a federal forum in which to assert federal immunity defenses. See International Primate Protection League, supra, at 86-87; Willingham, supra, at 407 (“[O]ne of the most important reasons for removal is to have the validity of the defense of official immunity tried in a federal court”); Jefferson County v. Acker, 527 U. S. 423, 447 (1999) (Scalia, J., concurring in part and dissenting in part) (noting that “the main point” of the federal officer removal statute “is to give officers a federal forum in which to litigate the merits of immunity defenses”).
Where a private person acts as an assistant to a federal official in helping that official to enforce federal law, some of these same considerations may apply. Regardless, in Davis v. South Carolina the Court wrote that the removal statute applies to private persons “who lawfully assist” the federal officer “in the performance of his official duty.” 107 U. S., at 600. And in City of Greenwood v. Peacock, 384 U. S. 808, 824 (1966), in interpreting a related removal provision, the Court repeated that the statute authorized removal by private parties “only” if they were “authorized to act with or for [federal officers or agents] in affirmatively executing duties under . . . federal law.” All the Court’s relevant post-1948 federal officer removal cases that we have found reflect or are consistent with this Court’s pre-1948 views. See Mesa v. California, 489 U. S. 121 (1989); Manypenny, supra; Willingham, supra; Peacock, supra.
III
With this history and precedent in mind, we return to the statute’s language. The relevant relationship is that of a private person “acting under” a federal “officer” or “agency.” 28 U. S. C. § 1442(a)(1) (emphasis added). In this context, the word “under” must refer to what has been described as a relationship that involves “acting in a certain capacity, considered in relation to one holding a superior position or office.” 18 Oxford English Dictionary 948 (2d ed. 1989). That relationship typically involves “subjection, guidance, or control.” Webster’s New International Dictionary 2765 (2d ed. 1953). See also Funk & Wagnalls New Standard Dictionary of the English Language 2604 (1942) (defining “under” as meaning “[subordinate or subservient to,” “[s]ubject to guidance, tutorship, or direction of”); 18 Oxford English Dictionary, supra, at 949 (“[sjubject to the instruction, direction, or guidance of”). In addition, precedent and statutory purpose make clear that the private person's “acting under” must involve an effort to assist, or to help carry out, the duties or tasks of the federal superior. See, e. g., Davis v. South Carolina, supra, at 600; see also supra, at 149-151.
In our view, the help or assistance necessary to bring a private person within the scope of the statute does not include simply complying with the law. We recognize that sometimes an English speaker might say that one who complies with the law “helps” or “assists” governmental law enforcement. Taxpayers who fill out complex federal tax forms, airline passengers who obey federal regulations prohibiting smoking, for that matter well-behaved federal prisoners, all “help” or “assist” federal law enforcement authorities in some sense of those words. But that is not the sense of “help” or “assist” that can bring a private action within the scope of this statute. That is in part a matter of language. One would usually describe the behavior of the taxpayers, airline passengers, and prisoners we have described as compliance with the law (or acquiescence to an order), not as “acting under” a federal official who is giving an order or enforcing the law. It is also in part a matter of the history and the precedent we have discussed. See supra, at 147-151.
Finally, it is a matter of statutory purpose. When a company subject to a regulatory order (even a highly complex order) complies with the order, it does not ordinarily create a significant risk of state-court “prejudice.” Cf. Soper, supra, at 32; Manypenny, supra, at 241-242. Nor is a state-court lawsuit brought against such a company likely to disable federal officials from taking necessary action designed to enforce federal law. Cf. Tennessee v. Davis, 100 U. S., at 262-263. Nor is such a lawsuit likely to deny a federal forum to an individual entitled to assert a federal claim of immunity. See, e. g., Willingham, supra, at 407.
The upshot is that a highly regulated firm cannot find a statutory basis for removal in the fact of federal regulation alone. A private firm’s compliance (or noncompliance) with federal laws, rules, and regulations does not by itself fall within the scope of the statutory phrase “acting under” a federal “official.” And that is so even if the regulation is highly detailed and even if the private firm’s activities are highly supervised and monitored. A contrary determination would expand the scope of the statute considerably, potentially bringing within its scope state-court actions filed against private firms in many highly regulated industries. See, e.g., Federal Insecticide, Fungicide, and Rodenticide Act, 7 U. S. C. § 136a (2000 ed. and Supp. IV) (mandating disclosure of testing results in the context of pesticide registration). Neither language, nor history, nor purpose lead us to believe that Congress intended any such expansion.
IV
Philip Morris advances two important arguments to the contrary. First, it points out that lower courts have held that Government contractors fall within the terms of the federal officer removal statute, at least when the relationship between the contractor and the Government is an unusually close one involving detailed regulation, monitoring, or supervision. See, e. g., Winters, 149 F. 3d 387. And it asks why, if close supervision is sufficient to turn a private contractor into a private firm “acting under” a Government “agency” or “officer,” does it not do the same when a company is subjected to intense regulation.
The answer to this question lies in the fact that the private contractor in such cases is helping the Government to produce an item that it needs. The assistance that private contractors provide federal officers goes beyond simple compliance with the law and helps officers fulfill other basic governmental tasks. In the context of Winters, for example, Dow Chemical fulfilled the terms of a contractual agreement by providing the Government with a product that it used to help conduct a war. Moreover, at least arguably, Dow performed a job that, in the absence of a contract with a private firm, the Government itself would have had to perform.
These circumstances distinguish Winters from this case. For present purposes that distinction is sufficient. And we need not further examine here (a case where private contracting is not at issue) whether and when particular circumstances may enable private contractors to invoke the statute.
Second, Philip Morris argues that its activities at issue here did not consist simply of compliance with regulatory laws, rules, and orders. It contends that the FTC, after initially testing cigarettes for tar and nicotine, “delegated authority” for that task to an industry-financed testing laboratory in 1987. E. g., Brief for Respondents 31 (emphasis added). And Philip Morris asserts that (along with other cigarette companies) it was acting pursuant to that delegation. It adds that ever since this initial “delegation” the FTC has “extensivefly]. .. supervis[ed]” and “closely monitored” the manner in which the laboratory tests cigarettes. Id., at 37, 30, 39. Philip Morris concludes that, given all these circumstances, just as Dow was “acting under” officers of the Department of Defense when it manufactured Agent Orange, see Winters, supra, at 399, so Philip Morris is “acting under” officers of the FTC when it conducts cigarette testing. See Brief for Respondents 38.
For argument’s sake we shall overlook the fact that the petitioners appear to challenge the way in which Philip Morris “designed” its cigarettes, not the way in which it (or the industry laboratory) conducted cigarette testing. We also shall assume the following testing-related facts that Philip Morris sets forth in its brief:
(1) In the 1950’s, the FTC ordered tobacco compames to stop advertising the amount of tar and nicotine contained in their cigarettes. See id., at 3.
(2) In 1966, the FTC altered course. It permitted cigarette companies to advertise “tar and nicotine yields” provided that the company had substantiated its statement through use of the Cambridge Filter Method, a testing method developed by Dr. Clyde Ogg, a Department of Agriculture employee. Id., at 4-5.
(3) The Cambridge Filter Method uses “a smoking machine that takes a 35 milliliter puff of two seconds’ duration on a cigarette every 60 seconds until the cigarette is smoked to a specified butt length.” FTC v. Brown & Williamson Tobacco Corp., 778 F. 2d 35, 37 (CADC 1985). It then measures the amount of tar and nicotine that is delivered. That data, in turn, determine whether a cigarette may be labeled as “light.” This method, Dr. Ogg has testified, “will not tell a smoker how much tar and nicotine he will get from any given cigarette,” but it “will indicate” whether a smoker “will get more from one than from another cigarette if there is a significant difference between the two and if he smokes the two in the same manner.” Brief for Respondents 5-6 (internal quotation marks omitted).
(4) In 1967, the FTC began to use its own laboratory to perform these tests. See id., at 6. And the Cambridge Filter Method began to be referred to as “the ‘FTC Method.’ ” Id., at 4.
(5) The FTC published the testing results periodically and sent the results annually to Congress. See id., at 7.
(6) Due to cost considerations, the FTC stopped testing cigarettes for tar and nicotine in 1987. Simultaneously, the tobacco industry assumed responsibility for cigarette testing, running the tests according to FTC specifications and permitting the FTC to monitor the process closely. See ibid.
(7) The FTC continues to publish the testing results and to send them to Congress. See ibid.
(8) The tobacco industry has followed the FTC’s requirement that cigarette manufacturers disclose (and make claims about) tar and nicotine content based exclusively on the results of this testing. See id., at 8-9.
Assuming this timeline, Philip Morris’ argument nonetheless contains a fatal flaw — a flaw of omission. Although Philip Morris uses the word “delegation” or variations many times throughout its brief, we have found no evidence of any delegation of legal authority from the FTC to the industry association to undertake testing on the Government agency’s behalf. Nor is there evidence of any contract, any payment, any employer/employee relationship, or any principal/agent arrangement.
We have examined all of the documents to which Philip Morris and certain supporting amici refer. Some of those documents refer to cigarette testing specifications, others refer to the FTC’s inspection and supervision of the industry laboratory’s testing, and still others refer to the FTC’s prohibition of statements in cigarette advertising. But none of these documents establish the type of formal delegation that might authorize Philip Morris to remove the case.
Several former FTC officials, for example, filed an amicus brief in which they state that “[i]n 198[7] the FTC delegated testing responsibility to the private Tobacco Industry Testing Lab (the ‘TITL’).” Brief for Former Commissioners and Senior Staff of the FTC 11. But in support of this proposition the brief cites a single source, a letter from the cigarette manufacturers’ lawyer to an FTC official. That letter states:
“[M]ajor United States cigarette manufacturers, who are responsible for the TITL’s operations and on whose behalf we are writing, do not believe that Commission oversight is needed .... Nevertheless, as an accommodation and in the spirit of cooperation, the manufacturers are prepared to permit Commission employees to monitor the TITL testing program . . . Letter from John P. Rupp to Judith P. Wilkenfeld (June 30, 1987), online at http://tobaccodocuments.org/nysa_ti_sl/ TI57900738.html (as visited June 7, 2007, and available in Clerk of Court’s case file).
Nothing in this letter refers to a delegation of authority. And neither Congress nor federal agencies normally delegate legal authority to private entities without saying that they are doing so.
Without evidence of some such special relationship, Philip Morris’ analogy to Government contracting breaks down. We are left with the FTC’s detailed rules about advertising, specifications for testing, requirements about reporting results, and the like. This sounds to us like regulation, not delegation. If there is a difference between this kind of regulation and, say, that of Food and Drug Administration regulation of prescription drug marketing and advertising (which also involve testing requirements), see Serono Labs., Inc. v. Shalala, 158 F. 3d 1313, 1316 (CADC 1998), that difference is one of degree, not kind.
As we have pointed out, however, differences in the degree of regulatory detail or supervision cannot ’by themselves transform Philip Morris’ regulatory compliance into the kind of assistance that might bring the FTC within the scope of the statutory phrase “acting under” a federal “officer.” Supra, at 152. And, though we find considerable regulatory detail and supervision, we can find nothing that warrants treating the FTC/Philip Morris relationship as distinct from the usual regulator/regulated relationship. This relationship, as we have explained, cannot be construed as bringing Philip Morris within the terms of the statute.
For these reasons, the judgment of the Eighth Circuit is reversed, and the case is remanded for further proceedings consistent with this opinion.
It is so ordered.