Following the Japanese attack of Pearl Harbor on Dec. 7, 1941, Lt. Reagan interrupted his acting career and on April 19, 1942, went on active duty. This was not achieved without some difficulty because when Lt. Reagan took his first physical exam, he was not accepted for active duty due to eyesight difficulties. His persistence finally triumphed and he was given another exam which he passed. However, he was classified for limited service only, which permanently denied to him his ambition of serving overseas. His first assignment was at the San Francisco Port of Embarkation, Fort Mason, Cal., as Liaison Officer of the Port and Transportation Office.