Cold War Questions: What decision was made by moderate Hungarian leader Imre Nagy, that resulted in a Soviet invasion of the country?

Question

What decision was made by moderate Hungarian leader Imre Nagy, that resulted in a Soviet invasion of the country?

Lewis Gant 45m3 · Accepted Answer

He announced that Hungary would leave the Warsaw pact.

What decision was made by moderate Hungarian leader Imre Nagy, that resulted in a Soviet invasion of the country?