On Aug. 31, 1949, Defense Secretary Louis Johnson announced the creation of an Armed Forces Day to replace separate Army, Navy and Air Force Days. The single-day celebration stemmed from the unification of the armed forces under one agency — the Department of Defense.
In a speech announcing the creation of the day, President Truman “praised the work of the military services at home and across the seas.” He said, “It is vital to the security of the nation and to the establishment of a desirable peace.”
In an excerpt from the Presidential Proclamation of Feb. 27, 1950, Truman stated:
“Armed Forces Day, Saturday, May 20, 1950, marks the first combined demonstration by America’s defense team of its progress, under the National Security Act, toward the goal of readiness for any eventuality. It is the first parade of preparedness by the unified forces of our land, sea, and air defense.”