 Upon his return to The United States in 1940, Pattison went directly into Officer’s Training School.From 1942 to 1945, he was given active command as Captain of a Pacific Command Sub Chaser, doing convoy duty between Hawaii and the Midway Islands.He was promoted to First Executive Officer on a Destroyer Escort, and was thereafter given full command as Captain of a second Destroyer Escort, running convoys across the Pacific from Florida to the African Coast and into the Mediterranean.