How many soldiers were in the American military before Pearl Harbor and how there at end of war?

Before the attack on Pearl Harbor on December 7, 1941, the United States military had approximately 1.6 million active-duty personnel, including both enlisted personnel and officers. This number was relatively small compared to the size of the military forces of other major countries at the time, such as Germany and Japan.

After the attack on Pearl Harbor, the United States rapidly expanded its military forces in order to fight the war. By the end of World War II in 1945, the United States military had grown to over 12 million active-duty personnel. This made the United States the largest military power in the world at the time.

The rapid expansion of the United States military during World War II was due to several factors, including:

* The need to replace the large number of soldiers who were killed or wounded in combat.

* The need to provide troops for the newly opened fronts in the war, such as the Pacific and North Africa.

* The need to train new soldiers to replace those who were being rotated out of combat.

The expansion of the United States military during World War II had a significant impact on the war effort. The large number of troops that the United States was able to field allowed the country to fight on multiple fronts and ultimately defeat its enemies.