When both sides agreed to stop fighting in korea, they signed an agreement known as a(n)

Armistice

Explanation:

The Korean Armistice Agreement was a document that was signed in order to bring the end of hostilities during the Korean War. It was signed on July 27, 1953 in order to put an end to violence until a final settlement was signed. However, a final peace settlement has not yet been achieved. This armistice also implemented the Korean Demilitarized Zone (DMZ), a de facto border between the two countries.

im not sure on this one

during the hitler era and it caused them to declare war on germany