list potus who were once in military

George Washington - Revolutionary War
Andrew Jackson - War of 1812
William Henry Harrison - War of 1812
Zachary Taylor - Mexican-American War
Franklin Pierce - Mexican-American War
James Buchanan - War of 1812
Abraham Lincoln - Black Hawk War
Ulysses S. Grant - Mexican-American War, Civil War
Rutherford B. Hayes - Civil War
James A. Garfield - Civil War
Chester A. Arthur - Civil War
Benjamin Harrison - Civil War
William McKinley - Civil War
Theodore Roosevelt - Spanish-American War
Harry S. Truman - World War I
Dwight D. Eisenhower - World War II
John F. Kennedy - World War II
Lyndon B. Johnson - World War II
Richard Nixon - World War II
Gerald Ford - World War II
Jimmy Carter - Cold War era
Ronald Reagan - World War II era
George H. W. Bush - World War II
George W. Bush - Texas Air National Guard
Donald Trump - Vietnam War era