Jefferson held four confidential talks with French consul Joseph Létombe in the spring of 1797 where he attacked Adams, predicting that his rival would serve only one term. He also encouraged France to invade England, and advised Létombe to stall any American envoys sent to Paris by instructing him to "listen to them and then drag out the negotiations at length and mollify them by the urbanity of the proceedings." This toughened the tone that the French government adopted toward the Adams administration. After Adams's initial peace envoys were rebuffed, Jefferson and his supporters lobbied for the release of papers related to the incident, called the XYZ Affair after the letters used to disguise the identities of the French officials involved. However, the tactic backfired when it was revealed that French officials had demanded bribes, rallying public support against France. The U.S. began an undeclared naval war with France known as the Quasi-War.