Complex sentence: After training at Camp Pendleton, he was sent to Camp Tarawa, Hawaii, to continue training in the 5th division for the invasion of Iwo Jima and was reassigned for duty as a liaison officer of H&S Company, 27th Marine Regiment, 5th Marine Division.
Split into simpler sentences: After training at Camp Pendleton, he was sent with the 5th Division to Camp Tarawa, Hawaii, to continue training for the invasion of Iwo Jima. He was reassigned for duty as a liaison officer of H&S Company, 27th Marine Regiment, 5th Marine Division.