Made somewhere for the rain waters to go and provided a means of transportation
Ronald Reagan defeated Walter Mondale in 1984, and in 1980 he defeated Jimmy Carter
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.
Hope I helped and please rate my answer :)