SC-7 was the code name for a large Allied World War II convoy of 35 merchant ships and six escorts which sailed eastbound from Sydney, Nova Scotia for Liverpool and other United Kingdom ports on 5 October 1940. While crossing the Atlantic, the convoy was intercepted by one of the German Navy's submarine wolfpacks. During the ensuing battle, the escort was completely overwhelmed and 20 of the 35 cargo vessels were sunk and 2 more damaged, with 141 lives lost.