She sailed unescorted from the San Francisco Bay area in spring 1945 with a cargo of naval munitions bound for Ulithi Atoll in the Western Caroline Islands, operated by the Pacific-Atlantic Steamship Company. There she served as one of many floating ammunition depots for what was at the time the world's largest naval base. Like other "ammo" ships, the Davidson Victory was stationed at a safe distance from the anchored fleet due to her volatile cargo. She left Ulithi in the summer of 1945 en route to the Philippines to prepare for the invasion of the Japanese home islands when the Japanese surrender was announced. After the surrender the ship was directed back to the Bay Area to unload its remaining cargo and discharge its United States Navy Armed Guard and cargo crew. Due largely to its late entry into the war, the Davidson "never heard a shot fired in anger." Nevertheless, she and her sister ships served a vital role in the war effort.
The Davidson Victory continued to transport foodstuffs and other cargo to Japan under the direction of the US War Shipping Administration until 1948, when it was leased to the Pacific-Atlantic Steamship Company of Tacoma, Washington and renamed the SS Montana. Ownership of the Montana was transferred to the States Steamship Company in 1955, and the ship was acquired by US Department of Commerce in 1961. The Montana as scrapped in Portland, Oregon in 1968.[2]