How did the US prepare its forces in the Pacific, especially in the Philippines, prior to Pearl Harbor?

Prior to the US’s entry into WWII it must have done something to organize, or even reinforce, its forces especially in its more venerable territories like Wake, Midway, Guam, and the Philippines. What did it do? What forces were sent to reinforce these garrisons and did the US do anything to help them when the war broke out?