Their duties included escorting convoys to Murmansk. Other activities included the aerial escorting of ground convoys. Later, they were charged with escorting the convoys of Armenian deportees. This made the resupply convoys vulnerable to attack. Close-air-support roles include supporting ground troops, escorting convoys, and urban operations. Involvement by the navy was limited to escorting Axis convoys in the Black Sea. In Arctic waters Soviet destroyers participated in the defense of Allied convoys. The task of escorting merchant convoys was still in the future. Armed food convoys, accompanied by armoured cars, drove down the East India Dock Road. This involved the bombing of English Channel convoys, ports, and RAF airfields and supporting industries. Important for information on troop convoys and orders of battle. Decoy convoys and vehicles are used to prevent tailing. McMorris had been assigned to interdict the Japanese supply and reinforcement convoys. The Americans lend their support by bombing German convoys. A number of Allied convoys were decimated.