Complex sentence: The 2nd Battalion was stationed on Umnak Island, west of Dutch Harbor and took part in the occupation of Adak Island and the assault on Kiska, 15 August 1943, part of the Aleutian Islands Campaign.
Split into simpler sentences: The 2nd Battalion was stationed on Umnak Island, west of Dutch Harbor and took part in the occupation of Adak Island and the assault on Kiska. August 15,1943, part of the Aleutian Islands Campaign.