By the outbreak of the First World War, Japan had an army of over 300,000 men, the fourth largest navy in the world, and a booming economy that could produce many of the armaments it needed. ... The First World War changed the political situation in East Asia. ... This was a great loss for the Japanese because America supplied 80% of Japan's oil. ... Six days later, Japanese naval and land forces began assaults on the US Pacific Fleet at Pearl Harbor. ... Within a few days, Germany and Italy had also now declared war on the United States. ...

• Word Count: 1677
• Approx Pages: 7