Complex sentence: In 1913, he commanded the one of the four divisions of the "Stimson Plan" modeled on the Maneuver Division, the 2nd Division (Central Department) and became commanding general of the Hawaiian Department before his retirement on November 19,1915.
Split into simpler sentences: In 1913, he commanded the one of the four divisions of the "Stimson Plan," the 2nd Division (Central Department). Carter became commanding general of the Hawaiian Department before his retirement on November 19,1915.