Hi there, so what i know is:
as détente broke down, progress on nuclear arms control stalled completely. As their relationship continued to erode, it became clear that both the U.S. and the Soviet Union had overestimated the extent to which détente would contribute to an agreeable and peaceful end of the Cold War.
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I hope this helps! And remember to always give me feedback if I got it incorrect, I promise I will make up for my mistakes :-)
<em> - Haley <3</em>
Instituted in the hope of avoiding war, appeasement was the name given to Britain’s policy in the 1930s of allowing Hitler to expand German territory unchecked. Most closely associated with British Prime Minister Neville Chamberlain, it is now widely discredited as a policy of weakness