Which US Presidents have served in the army?

Answer 1

George Washington and James Monroe served in the Continental Army.

Jefferson, Madison, Buchanan, Lincoln, Arthur and Polk served in the State Militia.

Jackson, Harrison, Tyler, Taylor, Pierce, Andrew Johnson, Grant, Hayes, Garfield, Harrison, McKinley, Theodore Roosevelt, Truman, Eisenhower and Reagan served in the US Army.

Kennedy,Lyndon Johnson, Nixon, Ford, Carter and George H. W. Bush served in the Navy.

George W. Bush was in the Texas Air National Guard.

John Adams, John Quincy Adams, Van Buren, Cleveland, Taft, Wilson, Harding, Coolidge, Hoover, Franklin D. Roosevelt and Clinton had no military service.

Andrew Jackson served in both the Continental and the US Army.

Answer 2

The Civil War generals who became President were the 18th, 19th, 20th, and 23rd Presidents:
Ulysses S. Grant (1822-1885)
Rutherford B. Hayes (1822-1893)
James Garfield (1831-1881)
Benjamin Harrison (1833-1901)

Ulysses Grant was the supreme Union commander by the end of the war. James Garfield was a major general. Rutherford Hayes, Benjamin Harrison, and Chester Arthur all held some type of rank as general in the Union army or a state militia. Arthur held brigadier general rank as quartermaster but was not in a combat unit.
Andrew Johnson also held the rank of brigadier general after Lincoln appointed him military governor of occupied Tennessee. His job was purely administrative. (William McKinley also fought in the Civil War but his highest rank was brevet major.)

Answer 3

most of the presidents Barak Obama was not in the army.

Answer 4

Ulysses Grant

Rutherford Hayes

Benjamin Harrison

James Garfield

McKinley

Arthur (?)