
The Grayback was responsible for sinking a fleet tanker and two transport ships, including one already damaged by the Shad.

Here are some of the many other notable events attributed to Grayback: The efforts of the Grayback and its sister ships played a large role in the success of the Allies’ first major Pacific campaign at Guadalcanal. Through the latter half of 1942, the Grayback damaged several freighters and was a general menace to enemy escorts, submarines and shipping vessels.

On March 17, 1942, the sub took down its first target, a 3,291-ton cargo ship off Port Lloyd in the Japanese-held Bonin Islands. In two years, it went on 10 successful war patrols, during which it sank a total of 63,835 tons and 14 ships. The USS Grayback was commissioned on June 30, 1941, and set sail for Pearl Harbor about six months later, quickly becoming a major part of the war’s submarine offensive.
