How did the US deal with conflict of World War II

they asked for a lot of help and fought

The Axis powers-Germany, Italy, and Japan-attempted to dominate the world. The Allies (U.S., Britain, France, USSR, and others) fought to stop them. The United States entered the war in 1941, after Japan's attack on Pearl Harbor. Germany surrendered in 1945, and Japan surrendered later that same year, after the U.S. dropped the atomic bomb on the cities of Hiroshima and Nagasaki.

answer; /// i believe that the correct answer is (divison of labor);

"a government in which power is divided between state and national levels". federalism is a system of government in which entities such and state and province, share power with the national government.