Question

What caused xyz affair to happen

Answer 1

The XYZ Affair was a political and diplomatic episode in 1797 and 1798, early in the administration of John Adams, involving a confrontation between the United States and Republican France that led to an undeclared war called the Quasi-War.

Answer 2

Pres. John Adams dispatched three ministers to France in 1797 to negotiate a commercial agreement to protect U.S. shipping. In Paris the ministers were approached by three French agents who suggested a bribe of $250,000 to Talleyrand, the French foreign minister, and a loan of $10,000,000 to France as a prelude to negotiations. In April 1798 the machinations of the three French agents (called X, Y, and Z in the diplomatic correspondence) were made public in the United States. There was a great outcry over the bribe solicitation, followed by preparations for war. Although a period of undeclared naval warfare ensued between France and the United States formal war was avoided, and the incident was settled by the Convention of 1800.

https://www.britannica.com/event/XYZ-Affair