The most important issue was that Christians In the west believed that the pope should be the leader of the Christian church
Neither side was able to make progress in the war and this was the effect of the stalemate of 1916 of the war in the western front. During World War I, the western front was considered as the main theater of war. After the outbreak of the war, the Germans opened up a front in the western part and started progressing until the progress was halted by the Battle of Marne.
It was the use of the Atomic Bomb. Having won the war in Europe, the Americans
and their allies concentrated their efforts on the Far East. Japan refused to surrender despite the
on-going bombings and destruction of her army.
They also threatened to kill American POWs if they U.S. invaded Japan. Truman
ordered the use of the atomic bomb. It was
used in Hiroshima on August 6 then again on Nagasaki on August 9 resulting to
Japan’s surrender.