What are two reasons why World War 2 ended?

Answer 1

President Harry Truman had many alternatives at his disposal for ending the war: invade the Japanese mainland, hold a demonstration of the destructive power of the atomic bomb for Japanese dignitaries, drop an atomic bomb on selected industrial Japanese cities, bomb and blockade the islands, wait for Soviet entry into the war on August 15, or mediate a compromised peace.

At the end of World War II, few questioned Truman's decision to drop the atomic bombs on Hiroshima and Nagasaki. Most Americans accepted the obvious reasoning: the atomic bombings brought the war to a more timely end. They did not have a problem with over one hundred thousand of the enemy being killed. After all, the Japanese attacked America, and not the other way around. In later years, however, many have begun to question the conventional wisdom of "Truman was saving lives," putting forth theories of their own. However, when one examines the issue with great attention to the results of the atomic bombings and compares these results with possible alternatives to using said bombs, the line between truth and fiction begins to clear. Truman's decision to use the atomic bomb on Japan was for the purpose of saving lives and ending the war quickly in order to prevent a disastrous land invasion.

Answer 2

World War 2 ended because the two major nations that started the war, Germany and Japan were defeated by the Western Allies and the USSR. Germany surrendered in the first half of 1945.

Japan held out to August 1945. The atomic bomb used by the US forced a Japanese surrender.

The US could have defeated Japan without an atomic bomb. US President Harry Truman saw that more lives on both sides would grow to large proportions. Therefore he decided to end the war quickly by using an atomic bomb on Hiroshima and then Nagasaki.

Answer 3

Because the war ended and their was no further need for more soldiers
It already ended.

Answer 4

Vietnam created too much turmoil; congress didn't re-new it.