Convoy

A group of ships traveling together, usually under naval escort, to reduce the risk of attack. Convoys concentrate defensive forces and organize movement through dangerous waters.

Convoy system: A method of organizing merchant ships into escorted groups for safer passage. Its scheduling and escort arrangements turn separate voyages into a coordinated defense.
Ancient Mediterranean piracy: Maritime raiding and theft practiced in the ancient Mediterranean Sea. Piracy created an early incentive for merchant vessels to travel in groups.
World War I Atlantic U-boat campaign: Germany's submarine campaign against Allied and neutral shipping during World War I. The campaign prompted the Allies to adopt escorted convoys in 1917.
North Atlantic shipping routes: Sea lanes connecting North America and Europe across the North Atlantic Ocean. Convoy routing concentrated traffic along lanes that escorts could patrol and defend.
Naval escort: A warship or force assigned to protect other vessels during passage. Escorts detect threats and engage attackers while merchant ships maintain formation.
Age of Sail: The period when sailing ships dominated long-distance maritime trade and warfare. Sailing-era navies developed convoy practices to protect commerce across oceans.
World War II Arctic convoys: Allied convoys that carried supplies from Britain and Iceland to the Soviet Union during World War II. They faced submarines, aircraft, and severe weather on a strategically vital route.
Merchant marine: A nation's commercial vessels and their civilian crews engaged in maritime transport. Convoy protection made civilian shipping an organized part of wartime logistics.
Anti-submarine warfare: Military operations and technologies used to detect, deter, and destroy submarines. Submarine detection and attack shaped convoy routes, escorts, and defensive tactics.
Atlantic convoy system: The organized escort of Allied merchant shipping across the Atlantic during the world wars. It became the best-known large-scale application of convoy protection.

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