The Arctic[note 2] was initially dominated by the Soviet Northern Fleet of a few destroyers, with larger numbers of submarines, minesweepers, and torpedo cutters supported by icebreakers.
The success of the 1940 German invasion of Norway provided the Kriegsmarine with naval bases from which capital ships might challenge units of the British Royal Navy Home Fleet.
Escorting cruisers typically maneuvered outside the formations, while a larger covering force including battleships and aircraft carriers often steamed nearby to engage Kriegsmarine capital ships or to raid the German naval bases in Norway.
[5] A branch of the Pacific Route began carrying Lend-Lease goods through the Bering Strait to the Soviet Arctic coast in June 1942.
Westbound tonnage through the Bering Strait totaled approximately 10% of North American wartime goods sent to Soviet Arctic ports.