Complex sentence: On 15 May 1941, the camp was converted to the nation's first Civilian Public Service conscientious objector camp, with 26 men and three women required to serve for one year, a term that was extended as the United States entered WWII.
Split into simpler sentences: On 15 May 1941 the camp was converted to the nation's first Civilian Public Service conscientious objector camp with 26 men and three women. The first inhabitants were required to serve for one year, but this was extended as the United States entered WWII.