opinion: Mr. Justice Douglas delivered the opinion of the Court.
  Petitioner is an Army Reserve officer not on active duty. His active-duty obligations were deferred while he went to law school after graduating from college. During the period of deferment and at the time this action was commenced, his military records were kept at Fort Benjamin Harrison, Indiana. His nominal commanding officer was the Commanding Officer of the Reserve Officer Components Personnel Center at Fort Benjamin Harrison. Petitioner was, however, at all times domiciled in California and was never in Indiana or assigned there. On finishing law school he took the California Bar examination and on March 5, 1970, he was ordered to report for active duty at Fort Gordon, Georgia, beginning April 13, 1970. Before that time, however, he had filed an application for discharge as a conscientious objector. That application was processed at Fort Ord, California, where hearings were held. Fort Ord recommended his discharge and review of that recommendation was had in Indiana. The result was disapproval of the application.
  Petitioner thereupon filed a petition for writ of habeas corpus in California. The District Court denied a motion to dismiss, holding that it had jurisdiction (3 S. S. L. R. 3152), but ruled against petitioner on the merits. On appeal the Court of Appeals agreed with the District Court as to jurisdiction but disagreed with it on the merits and granted the writ. 3 S. S. L. R. 3784. Shortly thereafter our decision in Schlanger v. Seamans, 401 U. S. 487, was announced. Thereupon the Court of Appeals granted a petition for rehearing and dismissed the action, holding that the District Court had no jurisdiction under the habeas corpus statutes. 445 F. 2d 843. The case is here on a petition for cer-tiorari, which we granted. We reverse the judgment below.
  In Schlanger the serviceman — on active duty in the Air Force — was studying in Arizona on assignment from Ohio. There was no officer in Arizona who was his custodian or one in his chain of command, or one to whom he was to report. While the Habeas Corpus Act extends to those “in custody under or by color of the authority of the United States,” 28 U. S. C. § 2241 (c)(1), we held in Schlanger that the presence of the “custodian” within the territorial jurisdiction of the District Court was a sine qua non. In Schlanger the only “custodian” of the serviceman was in Moody AFB, Georgia. While there were army officers in Arizona, there were none to whom the serviceman was reporting and none who were supervising his work there, though he was on active duty. Moreover, the serviceman in that case was in Arizona only temporarily for an educational project.
  In the present case California is Strait’s home. He was commissioned in California. Up to the controversy in the present case he was on reserve duty, never on active duty, and while he had gone east for graduate work in law, California had always been his home. Fort Ord in California was where his application for conscientious objector discharge was processed and where hearings were held. It was in California where he had had his only meaningful contact with the Army; and his superiors there recommended his discharge as a conscientious objector.
  Thus, the contention in the dissent that we “abandon Schlanger” by the approach we take today is incorrect. Sergeant Schlanger was on permissive temporary duty. While his stay in Arizona was thus not charged to his leave time, it was primarily for his own benefit, he paid his own expenses, and he was as much on his own as any serviceman on leave. We held in Schlanger that, while an active-duty serviceman in such a status might be in military “custody,” see Donigian v. Laird, 308 F. Supp. 449 (Md. 1969), his custodian may not be deemed present wherever the serviceman has persuaded the service to let him go. The jurisdictional defect in Schlanger, however, was not merely the physical absence of the Commander of Moody AFB from the District of Arizona, but the total lack of formal contacts between Schlanger and the military in that district.
  Strait’s situation is far different. His nominal custodian, unlike Schlanger’s, has enlisted the aid and directed the activities of armed forces personnel in California in his dealings with Strait. Indeed, in the course of Strait’s enlistment, virtually every face-to-face contact between him and the military has taken place in California. In the face of this record, to say that Strait’s custodian is amenable to process only in Indiana — or wherever the Army chooses to locate its recordkeeping center, see n. 3, infra — would be to exalt fiction over reality.
  In a closely parallel case the Court of Appeals for the Second Circuit held that an unattached reserve officer who lived in New York and whose application for discharge as a conscientious objector was processed in New York could properly file for habeas corpus in New York, even though the commanding officer of the reservists was in Fort Benjamin Harrison, Indiana. Arlen v. Laird, 451 F. 2d 684. The court held that the only contacts the serviceman had had with his commanding officer were through the officers he dealt with in New York. Those contacts, it concluded, were sufficient to give the commanding officer “presence” in New York. It concluded:
  “Quite unlike a commanding officer who is responsible for the day to day control of his subordinates, the commanding officer of the Center is the head of a basically administrative organization that merely keeps the records of unattached reservists. To give the commanding officer of the Center ‘custody’ of the thousands of reservists throughout the United States and to hold at the same time that the commanding officer is present for habeas corpus purposes only within one small geographical area .is to ignore reality.” Id., at 687.
  We agree with that view. Strait’s commanding officer is “present” in California through the officers in the hierarchy of the command who processed this serviceman’s application for discharge. To require him to go to Indiana where he never has been or assigned to be would entail needless expense and inconvenience. It “would result in a concentration of similar cases in the district in which the Reserve Officer Components Personnel Center is located.” Donigian v. Laird, 308 F. Supp., at 453. The concepts of “custody” and “custodian” are sufficiently broad to allow us to say that the commanding officer in Indiana, operating through officers in California in processing petitioner’s claim, is in California for the limited purposes of habeas corpus jurisdiction.
  We intimate no opinion on the merits of the controversy — whether petitioner is entitled to a discharge or whether by denying that relief the Army has acted in accordance with the prescribed procedures. We hold only that there is jurisdiction under 28 U. S. C. § 2241 (c)(1) for consideration of this habeas corpus petition and for decision on the merits.
  Reversed.
  At the time Sergeant Schlanger received his assignment, Air Force Regulation 35-26 (Mar. 6, 1968) defined “permissive temporary duty” as “duty of a quasi-official nature performed at other than the permanent duty station, without costs to the Government for per diem and travel.” So defined, primary difference between “leave” and “permissive temporary duty” appears to be that the latter status requires the serviceman to convince the military that his proposed activity, while away from his permanent duty station, would be of some direct or indirect benefit to the service.
  That such “presence” may suffice for personal jurisdiction is well settled, McGee v. Int’l Life Ins. Co., 355 U. S. 220; Int’l Shoe Co. v. Washington, 326 U. S. 310, and the concept is also not a novel one as regards habeas corpus jurisdiction. In Ex parte Endo, 323 U. S. 283, 307, we said that habeas corpus may issue “if a respondent who has custody of the prisoner is within reach of the court’s process . . . .” Strait’s commanding officer is “present” in California through his contacts in that State; he is therefore “within reach” of the federal court in which Strait filed his petition. See Donigian v. Laird, 308 F. Supp. 449, 453; cf. United States ex rel. Armstrong v. Wheeler, 321 F. Supp. 471, 475.
  This concentration would be exacerbated in the extreme by the fact that the Reserve Components Personnel Center at Fort Benjamin Harrison, Indiana, has now been moved to St. Louis, Missouri, and has been there merged into the United States Army Reserve Components Personnel and Administration Center (RCPAC). RCPAC has recordkeeping and nominal administrative responsibility for approximately 2,000,000 servicemen, all unattached, inactive reservists such as petitioner.
choices: attorney general of the United States, or his office specified state board or department of education city, town, township, village, or borough government or governmental unit state commission, board, committee, or authority county government or county governmental unit, except school district court or judicial district state department or agency governmental employee or job applicant female governmental employee or job applicant minority governmental employee or job applicant minority female governmental employee or job applicant not listed among agencies in the first Administrative Action variable retired or former governmental employee U.S. House of Representatives interstate compact judge state legislature, house, or committee local governmental unit other than a county, city, town, township, village, or borough governmental official, or an official of an agency established under an interstate compact state or U.S. supreme court local school district or board of education U.S. Senate U.S. senator foreign nation or instrumentality state or local governmental taxpayer, or executor of the estate of state college or university United States State person accused, indicted, or suspected of crime advertising business or agency agent, fiduciary, trustee, or executor airplane manufacturer, or manufacturer of parts of airplanes airline distributor, importer, or exporter of alcoholic beverages alien, person subject to a denaturalization proceeding, or one whose citizenship is revoked American Medical Association National Railroad Passenger Corp. amusement establishment, or recreational facility arrested person, or pretrial detainee attorney, or person acting as such;includes bar applicant or law student, or law firm or bar association author, copyright holder bank, savings and loan, credit union, investment company bankrupt person or business, or business in reorganization establishment serving liquor by the glass, or package liquor store water transportation, stevedore bookstore, newsstand, printer, bindery, purveyor or distributor of books or magazines brewery, distillery broker, stock exchange, investment or securities firm construction industry bus or motorized passenger transportation vehicle business, corporation buyer, purchaser cable TV car dealer person convicted of crime tangible property, other than real estate, including contraband chemical company child, children, including adopted or illegitimate religious organization, institution, or person private club or facility coal company or coal mine operator computer business or manufacturer, hardware or software consumer, consumer organization creditor, including institution appearing as such; e.g., a finance company person allegedly criminally insane or mentally incompetent to stand trial defendant debtor real estate developer disabled person or disability benefit claimant distributor person subject to selective service, including conscientious objector drug manufacturer druggist, pharmacist, pharmacy employee, or job applicant, including beneficiaries of employer-employee trust agreement, employee health and welfare fund, or multi-employer pension plan electric equipment manufacturer electric or hydroelectric power utility, power cooperative, or gas and electric company eleemosynary institution or person environmental organization employer. If employer's relations with employees are governed by the nature of the employer's business (e.g., railroad, boat), rather than labor law generally, the more specific designation is used in place of Employer. farmer, farm worker, or farm organization father female employee or job applicant female movie, play, pictorial representation, theatrical production, actor, or exhibitor or distributor of fisherman or fishing company food, meat packing, or processing company, stockyard foreign (non-American) nongovernmental entity franchiser franchisee lesbian, gay, bisexual, transexual person or organization person who guarantees another's obligations handicapped individual, or organization of devoted to health organization or person, nursing home, medical clinic or laboratory, chiropractor heir, or beneficiary, or person so claiming to be hospital, medical center husband, or ex-husband involuntarily committed mental patient Indian, including Indian tribe or nation insurance company, or surety inventor, patent assigner, trademark owner or holder investor injured person or legal entity, nonphysically and non-employment related juvenile government contractor holder of a license or permit, or applicant therefor magazine male medical or Medicaid claimant medical supply or manufacturing co. racial or ethnic minority employee or job applicant minority female employee or job applicant manufacturer management, executive officer, or director, of business entity military personnel, or dependent of, including reservist mining company or miner, excluding coal, oil, or pipeline company mother auto manufacturer newspaper, newsletter, journal of opinion, news service radio and television network, except cable tv nonprofit organization or business nonresident nuclear power plant or facility owner, landlord, or claimant to ownership, fee interest, or possession of land as well as chattels shareholders to whom a tender offer is made tender offer oil company, or natural gas producer elderly person, or organization dedicated to the elderly out of state noncriminal defendant political action committee parent or parents parking lot or service patient of a health professional telephone, telecommunications, or telegraph company physician, MD or DO, dentist, or medical society public interest organization physically injured person, including wrongful death, who is not an employee pipe line company package, luggage, container political candidate, activist, committee, party, party member, organization, or elected official indigent, needy, welfare recipient indigent defendant private person prisoner, inmate of penal institution professional organization, business, or person probationer, or parolee protester, demonstrator, picketer or pamphleteer (non-employment related), or non-indigent loiterer public utility publisher, publishing company radio station racial or ethnic minority person or organization protesting racial or ethnic segregation or discrimination racial or ethnic minority student or applicant for admission to an educational institution realtor journalist, columnist, member of the news media resident restaurant, food vendor retarded person, or mental incompetent retired or former employee railroad private school, college, or university seller or vendor shipper, including importer and exporter shopping center, mall spouse, or former spouse stockholder, shareholder, or bondholder retail business or outlet student, or applicant for admission to an educational institution taxpayer or executor of taxpayer's estate, federal only tenant or lessee theater, studio forest products, lumber, or logging company person traveling or wishing to travel abroad, or overseas travel agent trucking company, or motor carrier television station union member unemployed person or unemployment compensation applicant or claimant union, labor organization, or official of veteran voter, prospective voter, elector, or a nonelective official seeking reapportionment or redistricting of legislative districts (POL) wholesale trade wife, or ex-wife witness, or person under subpoena network slave slave-owner bank of the united states timber company u.s. job applicants or employees Army and Air Force Exchange Service Atomic Energy Commission Secretary or administrative unit or personnel of the U.S. Air Force Department or Secretary of Agriculture Alien Property Custodian Secretary or administrative unit or personnel of the U.S. Army Board of Immigration Appeals Bureau of Indian Affairs Bonneville Power Administration Benefits Review Board Civil Aeronautics Board Bureau of the Census Central Intelligence Agency Commodity Futures Trading Commission Department or Secretary of Commerce Comptroller of Currency Consumer Product Safety Commission Civil Rights Commission Civil Service Commission, U.S. Customs Service or Commissioner of Customs Defense Base Closure and REalignment Commission Drug Enforcement Agency Department or Secretary of Defense (and Department or Secretary of War) Department or Secretary of Energy Department or Secretary of the Interior Department of Justice or Attorney General Department or Secretary of State Department or Secretary of Transportation Department or Secretary of Education U.S. Employees' Compensation Commission, or Commissioner Equal Employment Opportunity Commission Environmental Protection Agency or Administrator Federal Aviation Agency or Administration Federal Bureau of Investigation or Director Federal Bureau of Prisons Farm Credit Administration Federal Communications Commission (including a predecessor, Federal Radio Commission) Federal Credit Union Administration Food and Drug Administration Federal Deposit Insurance Corporation Federal Energy Administration Federal Election Commission Federal Energy Regulatory Commission Federal Housing Administration Federal Home Loan Bank Board Federal Labor Relations Authority Federal Maritime Board Federal Maritime Commission Farmers Home Administration Federal Parole Board Federal Power Commission Federal Railroad Administration Federal Reserve Board of Governors Federal Reserve System Federal Savings and Loan Insurance Corporation Federal Trade Commission Federal Works Administration, or Administrator General Accounting Office Comptroller General General Services Administration Department or Secretary of Health, Education and Welfare Department or Secretary of Health and Human Services Department or Secretary of Housing and Urban Development Interstate Commerce Commission Indian Claims Commission Immigration and Naturalization Service, or Director of, or District Director of, or Immigration and Naturalization Enforcement Internal Revenue Service, Collector, Commissioner, or District Director of Information Security Oversight Office Department or Secretary of Labor Loyalty Review Board Legal Services Corporation Merit Systems Protection Board Multistate Tax Commission National Aeronautics and Space Administration Secretary or administrative unit of the U.S. Navy National Credit Union Administration National Endowment for the Arts National Enforcement Commission National Highway Traffic Safety Administration National Labor Relations Board, or regional office or officer National Mediation Board National Railroad Adjustment Board Nuclear Regulatory Commission National Security Agency Office of Economic Opportunity Office of Management and Budget Office of Price Administration, or Price Administrator Office of Personnel Management Occupational Safety and Health Administration Occupational Safety and Health Review Commission Office of Workers' Compensation Programs Patent Office, or Commissioner of, or Board of Appeals of Pay Board (established under the Economic Stabilization Act of 1970) Pension Benefit Guaranty Corporation U.S. Public Health Service Postal Rate Commission Provider Reimbursement Review Board Renegotiation Board Railroad Adjustment Board Railroad Retirement Board Subversive Activities Control Board Small Business Administration Securities and Exchange Commission Social Security Administration or Commissioner Selective Service System Department or Secretary of the Treasury Tennessee Valley Authority United States Forest Service United States Parole Commission Postal Service and Post Office, or Postmaster General, or Postmaster United States Sentencing Commission Veterans' Administration War Production Board Wage Stabilization Board General Land Office of Commissioners Transportation Security Administration Surface Transportation Board U.S. Shipping Board Emergency Fleet Corp. Reconstruction Finance Corp. Department or Secretary of Homeland Security Unidentifiable International Entity