During the past century, U.S. Navy patrol vessels have operated everywhere larger warships have—as well as in places where the big boats could not operate. These bantam warriors have performed in a variety of roles, from antisubmarine warfare to convoy escort and offensive operations against enemy forces afloat and ashore. Patrol vessels battled German units in the Mediterranean, fought insurgents along rivers and canals in China and Vietnam and protected U.S. ships and facilities in the Persian Gulf. Covering more than 1000 of the Navy’s small combatants, this comprehensive survey provides all-time rosters, histories, specifications and illustrations of patrol vessels from before World War I to the present. World War II PT boats and submarine chasers and Vietnam War swift boats are covered, along with less well known ships such as Eagle boats, patrol yachts, hydrofoil gunboats and control escorts. A detailed accounting of patrol vessel exports, transfers and shipbuilders is included.