The expression military–industrial complex (MIC) describes the relationship between a country's military and the defense industry that supplies it, seen together as a vested interest which influences public policy. A driving factor behind the relationship between the military and the defense corporations is that both sides benefit—one side from obtaining weapons, and the other from being paid to supply them. The term is most often used in reference to the system behind the armed forces of the United States, where the relationship is most prevalent due to close links among defense contractors, the Department of Defense, and politicians. The expression gained popularity after a warning of the relationship's harmful effects, in the farewell address of U.S. President Dwight D. Eisenhower in 1961. The term has also been used in relation to Russia, especially since its 2022 invasion of Ukraine.