21 Presidents served on active duty in a regular military unit.
Reagan was on active duty in WWW but served in a unit that made training films. Lyndon Johnson was called home after short service since he was a Congressman at the time.
Nine others had some form of military service. Chester Arthur was a high-ranking supply officer in the NY state militia during the Civil War. Andrew Johnson served as military governor of re-occupied Tennessee during the Civil War. Madison, Tyler, Polk, Buchanan and Lincoln had brief service in state militia units that saw no fighting. Fillmore was in a home guard during the Civil War after he was President. George W. Bush was in the air force reserves.
Zero. Many Presidents served in the military, but none were in ROTC.
US Presidents do not have to have served in the military in order to be elected.
The following 13 presidents never served in the military: Obama - Clinton - Franklin Roosevelt - Hoover - Coolidge - Harding - Wilson - Taft - Cleveland - Fillmore - van Buren - Adams - Adams.
Actually many future Presidents were commanded by Presidents. Example: JF Kennedy served in the Navy under Roosevelt and Trueman (Who served in the Army under Wilson). LB Johnson served in the Navy under FDR, George HW Bush served in the Navy under FDR & Trueman. Many of the Presidents served in the military and took orders from the Presidents in office.
There were 25 US presidents who never served in the Senate.
I count five: Grant, Hayes, Garfield, B. Harrison and McKinley.
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14 presidents served as vice president before becoming president
The US has had a lot of small conflicts that involved military action, but all presidents except for Madison, Polk, Lincoln, McKinley, Wilson, F. Roosevelt, Truman, Lyndon Johnson. G. H. W. Bush , George W. Bush and Obama either served only in peace time or had only brief periods when they called on the military for foreign or domestic disputes. I did not count Indian Wars which broke out from time to time but usually did not last long. So, you could say the 31 presidents served only in peace time.
Woodrow Wilson was one
How many presidents had no military service at the time of their election?