The first Canadian aid to the UN forces came from the Royal Canadian Navy. On July 12, 1950, three Canadian destroyers, HMCS "Cayuga", HMCS "Athabaskan" and , were sent to Korea to serve under United Nations Command. These ships supported the assault at Inchon and played an especially important role in the evacuation. Canadian ships also kept up the blockade on North Korean waters and protected coastal villages from attack.