During World War I Embick served on the staff of the Supreme War Council, and then the commission to Negotiate Peace, for which he received the Army Distinguished Service Medal. The citation for the medal reads:
The President of the United States of America, authorized by Act of Congress, July 9, 1918, takes pleasure in presenting the Army Distinguished Service Medal to Colonel (Signal Corps) Stanley Dunbar Embick, United States Army, for exceptionally meritorious and distinguished services to the Government of the United States, in a duty of great responsibility during World War I. As a member of the American Section of the Supreme War Council, by his sound military judgment, qualifications, his breadth of vision, and his sound military judgment, Colonel Embick has rendered invaluable aid in solving the many complex problems that have come before the Supreme War Council.[3]
In December 1919 Embick was assigned to the staff of the War Department's War Plans Division, where he served until attending the Army War College. After serving as a War College instructor, Embick served in the Philippines, afterwards returning to Washington to serve as Executive Officer of the War Plans Division. In 1930 he became commandant of the Coast Artillery School.
In 1932 Embick was appointed commander of harbor defenses in the Philippines as a brigadier general, where he was responsible for constructing Corregidor's Malinta Tunnel, which was used as a bomb-proof storage and personnel bunker and hospital during World War II, and is now the venue for a historical audio-visual presentation about the war.
Embick became Director of the War Plans Division as a major general in 1936, and later that year was named the Army's Deputy Chief of Staff. He was appointed IV Corps commander in 1938, and later the same year took command of the Third Army as a lieutenant general, where he served until his 1941 retirement.
In the late 1940s Embick served on the commission that proposed reforms to America's military and intelligence agencies, including creation of the Department of Defense by merging the War and Navy Departments.
Biographical Annals of Cumberland County, Pennsylvania, Chicago: The Genealogical Publishing Co., 1905, pages 141–143
General Stanley D. Embick: Military Dissenter, Society for Military History, by Ronald Schaffer, 1973
Men of West Point: The First 150 Years of the United States Military Academy, by Richard Ernest Dupuy, 1951
Biographical Register of the Officers and Graduates of the U.S. Military Academy at West Point, New York Since its Establishment in 1802, by George Washington Cullum, 1920, Supplemental Volume VI-A, page 873
Corregidor in Peace and War, by Charles M. Hubbard and Collis H. Davis, 2007
Dominion or Decline: Anglo-American Naval Relations on the Pacific, 1937–1941, by Ian Cowman, 1996
Dumbarton Oaks: The Origins of the United Nations and the Search for Postwar Security, by Robert C. Hilderbrand, 1990
The National Cyclopaedia of American biography, by James Terry White, 1967, Volume 43, page 102