Answer: Oil.
Japan wanted southern Indochina's supply of oil as they were starved for it and unable to maintain their military. On the same day they attacked Pearl Harbour they also attacked the Philippines to gain access to this oil. The attack on Pearl Harbour was to prevent any armada of US ships from retaking the Philippines, which they succeeded at doing.
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The U.S constitution was fully signed on July 4th, 1776, the day America lawfully became a country.
The Muslims faith benefited the entire region during their golden age when the Sufi missionaries spread Islam which brought messages to different regions around the world. Some of the principal locations were Ancient Mesopotamia, Persia, North Africa, and Central Asia.
If one of the answers is machines then that is the answer
World War also started after archduke Francis Ferdinand got assassinated.
