A ceasefire (or truce) is a temporary stoppage of a war in which each side agrees with the other to suspend aggressive actions. Ceasefires may be declared as part of a formal treaty, but they've also been called as part of an informal understanding between opposing forces. Historical examples World War I On December 24, 1914, there was an unofficial ceasefire as France, the United Kingdom, and Germany observed Christmas. No treaty was signed, and the war resumed after a few days. Korean War A c… (More on Cease-fire)