Multiple choice Which of the following military pact was formed by Soviet Union? NATO SEATO WARSA PACT CENTO Reveal answer Fill a bubble to check yourself C Correct answer Explanation The Warsaw Pact was the military alliance formed by the Soviet Union in 1955 in response to NATO. It included the Soviet Union and Eastern European satellite states. NATO is Western, SEATO was in Southeast Asia, and CENTO was in the Middle East.