"Crowninshield" cruised along the Atlantic coast and in the Caribbean, participating in 1921 in the fleet concentration in the Panama Canal Zone and Cuban waters. During this exercise she carried Secretary of the Navy Josephus Daniels from Key West to Guantanamo Bay for fleet maneuvers. From 14 November 1921 "Crowninshield" operated with 50 percent of her complement until placed out of commission in reserve at Philadelphia, Pennsylvania 7 July 1922.