 Complete the following phrase:  The 7th Antiaircraft Artillery Battalion 7th AAA Bn was a United States Marine Corps antiaircraft unit that served during World War II. Formed in 1940 as the 7th Defense Battalion, its original mission was to provide air and coastal defense for advanced naval bases. It was one of first five defense battalions deployed in support of the color-coded war plans that called for the defense of Hawaii and other outlying United States possessions in the Pacific Ocean. These five battalions were nicknamed the Rainbow Five. During the war the battalion defended Tutuila, Upolu, Savaii and Nanumea and took part in combat operations at 