"Pollack" (commanded by Stanley P. Moseley, Class of 1925), and departed Pearl Harbor on 13 December and were off the coast of Honshū, Japan, a few hours before midnight on 31 December, the first American warships to reach Japanese waters in World War II. "Pollack" damaged the 2,700-ton cargo ship "Heijo Maru" on 5 January 1942 and two days later sent the 2,250-ton cargo ship "Unkai Maru No. 1" to the bottom, the first officially confirmed victim of the Pacific Fleet Submarine Force. On 9 January she sank the 5,387-ton freighter "Teian Maru" by a night surface attack, and ended her first war patrol at Pearl Harbor on 21 January.