What were the key events in its development?Given the political, military, and ideological situations at the time, was the Cold War unavoidable?

In a minimum of 250 words answer the questions below.

Questions:

International affairs in the postwar era were dominated by the Cold War.

1) What were the key events in its development?

2) Which side was responsible?

3) Given the political, military, and ideological situations at the time, was the Cold War unavoidable? Support your conclusions.