What was the wisest strategic decision in World War II
and what was the most questionable?

The Japanese attack on Pearl Harbor on December 7, 1941 catalyzed American entry into World War II, silencing former isolationists and unifying America in a way that only a direct assault on home soil could have done. Yet, the day "that would live in infamy" first entailed America' intervention not against Japanese conquest, but against Hitler in Europe. Arguably one of the wisest strategic decisions of World War II, Roosevelt's solution to help the Allies defeat the menace in Europe first while doing just enough in the Pacific to halt further Japanese advance ultimately led to an Allied victory. The fall of France to blitzkrieg lightning warfare awakened America to the rapid force of Hitler's advance, and fearful of seeing the lone British allies fall, Roosevelt poured troops into reinforce the western front, turning the tide of the war. Roosevelt thus ensured Allied assistance later in the Pacific instead of facing off the enemy alone. Policy in the East under Truman, however, was much more questionable. By far, the most controversial decision was the usage of the atomic bombs on two largely civilian populations in Hiroshima and Nagasaki within a span of three days. The detonation of the atomic bombs wiped out cities, ended the war in the East, and sparked the nuclear arms race. Some argue that the difficult decision to use the atomic bomb was made with much deliberation and its use was in the long run for the greater good for the country and the world. However, the morality of such brutal tactics has been questioned even generations after.