 Later in June 1944, 'A' and 'O' parties suffered heavy casualties when they were involved in Operation Brassard, the capture of the island of Elba.Others took part in Allied operations in Yugoslavia and Greece.Also in June 1944, eight units—'F', 'J', 'L', 'P', 'Q', 'R', 'S', 'T' and 'W' Commandos, the latter made up of volunteers from the Royal Canadian Navy—took part in Operation Neptune during the D-Day landings in Normandy in June 1944.