What were the concerns of the US about the situation in Asia during World War 2?

Answer 1

The United States was concerned about Japan's expansion in Asia. It had invaded Manchuria, a province in China, and was killing and raping thousands of Chinese people. This was a human rights concern. The western world also had vested interests in the region which the United States wanted to protect. The French were in control of much of Indochina, the Dutch had some territories, and America itself had the Philippines, Guam, and several other small islands in the Pacific for self-defense purposes. Japan's expansion endangered the USA's hold on that land, therefore disrupting plans for self-defense and commerce. What finally brought the United States into the Pacific War was the December 7, 1941 attack on Pearl Harbor. At this point, it became much more than protecting the Chinese and American economic and defense interests. It became important to signal to the Japanese that the United States could not be attacked on its own land without reprisal.