On 28 April 1917, U-14 was patrolling off the coast of Greece when she scored her first success, Teakwood, a 5,315-ton British tanker headed from Port Arthur, Texas, to Port Said.[15] On 3 May, on patrol in the same vicinity, von Trapp and U-14 sank another ship, this one the 1,905-ton Italian steamer Antonio Sciesa.[16]