"Procyon" participated in the invasion landings at Sicily in July and at Salerno in September. Unloading army vehicles at Naples, following the invasion at Salerno, "Procyon" moved to Arzew, Algeria and commenced a program of shipboard indoctrination and practice assault landings for the training of Free French Forces, including Algerian and Senegalese troops. When this training ceased 22 November, she shifted to Oran and joined a convoy headed for the Clyde River in Scotland. She entered the Clyde River 9 December and docked at Glasgow to off-load mail, army personnel, and much needed aircraft parts and ammunition cases. Ten days later she passed out to sea in convoy and under escort by HMS "Searcher", bound for the U.S. She arrived Norfolk 2 January 1944, and following independent operations, shifted to New York 14 February to load cargo for shipment to the British Isles. Skirting known positions of German "wolf-packs", she reached Swansea, Wales 11 March and sailed again 13 April with a merchant convoy bound for Algeria. She entered the now familiar Mers-el-Kebir Harbor 26 April and commenced a hectic training schedule in preparation for the invasion of Southern France. "Procyon", with men of the 180th Battalion of the famed 45th "Thunderbird" Division embarked, participated in the landings at the Golfe de St. Tropez 15 August. Three times she returned to France carrying Army cargo from Naples before sailing 20 October to return to Philadelphia.