As a conscientious objector during World War II, he was conscripted into the Civilian Public Service at Camp 56 (Camp Angel) in Oregon.
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During World War II, Sheets served as a conscientious objector for four years, first in Civilian Public Service Camp no. 21 at Cascade Locks, and then in Camp Angel near Waldport, Oregon, where he became part of a gifted group of artists, writers, and performers.