 He then commanded the 5th Marine Expeditionary Brigade, which was redesignated the 5th Marine Amphibious Brigade on September 1, 1967.On April 30, 1971, Dwyer became commanding general of 1st Marine Division at Camp Pendleton, California, and also assumed additional duties as commanding general of I Marine Amphibious Force.Dwyer was promoted to major general in August 1971.