During World War II, Sampson was one of only three Canadian military personnel stationed at Supreme Headquarters Allied Expeditionary Force (SHAEF) under General Dwight D. Eisenhower,U.S. Army, U.S. Forces, European Theater, Historical Division: Records, 1941-1946. http://www.fold3.com/document/291148582/ the Supreme Allied Commander. He was selected due to his expertise regarding the repatriation of military prisoners of war. Notable later stations included Argentina and Paris following World War II.Vance, Jonathan, F. Objects of Concern. Canadian Prisoners of War Through the 20th Century; UBC Press, 1992. Sampson was head of air force personnel in London leading up to the Battle of Britain 1939 - 1940.Ottawa Citizen, 8 February 1939; "Down Ampney Base Crews Stay Off Job". Air Force Association of Canada. http://airforce.ca/awards.php?search=1&keyword=&page=658&mem=&type=rcaf In February 1939, following the Munich Agreement and during preparations to defend England against an imminent German air campaign, which commenced later that year, Sampson was instrumental in quashing a general strike by 1,500 Canadian enlisted personnel stationed at RCAF Odiham Air Base, Down Ampney, Gloucestershire, England. With threat of war on the horizon, the enlisted personnel were seeking immediate repatriation to Canada.Ottawa Citizen, 8 February 1939; "Down Ampney Base Crews Stay Off Job". The base was a critical air logistics hub for British defensive operations. Acting on direct orders from Canadian Prime Minister Mackenzie King to enforce Canada's military commitments in defense of England in the lead up to World War II, Sampson confronted strike leaders on the steps of Canada House in London, 8 February 1939 declaring "It will be considered mutiny if you men are out after February 11, 1939".See 6 Group Bomber Command: http://www.6grouprcaf.com/.
