Question

what action prompted british prime minister winston churchill to declare that an iron curtain had fallen across europe?
the united nations forced an end to the british empire.
the allies of world war ii had taken a stand against the axis.
the soviet union had imposed communist governments on the nations of eastern europe
eastern european nations united to build an iron wall between eastern and western bloc countries.

Explanation:

Winston Churchill used the term "iron curtain" in a 1946 speech. The Soviet Union had imposed communist governments on Eastern European nations after World War II. This division between the Soviet - influenced East and the Western - bloc countries (capitalist) was what Churchill was referring to. The United Nations did not end the British Empire in this context. The Allies of World War II were on the same side against the Axis during the war, but post - war, the Soviet Union's actions in Eastern Europe were a key factor. Eastern European nations did not build an "iron wall" themselves; it was more about the Soviet Union's influence.

Answer:

The Soviet Union had imposed communist governments on the nations of Eastern Europe.