Final answer:
Japan invaded multiple countries in Asia by 1941 and went to war with the US due to its need for oil.
Explanation:
Japan invaded several countries by 1941, including China, Vietnam, Cambodia, and Laos. These invasions were part of Japan's expansionist policies in Asia during World War II.
Japan went to war with the United States due to its need for oil. The U.S. imposed an oil embargo on Japan, which significantly affected Japan's military capabilities and led to tensions that culminated in the attack on Pearl Harbor in 1941.
Learn more about Japanese expansion in Asia during World War II here:
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