Just 2: FDR & Truman.
Wilson.
Woodrow Wilson
Wilson, FDR and Truman.
Truman and all presidents are the Commander in Chief over all the military branches and ultimate leader of the war for the US.
The president during World War I (1914-1918) was Thomas Woodrow Wilson. The presidents during World War II (1939-1945) were Franklin Delano Roosevelt and Harry S. Truman. Franklin Roosevelt died in office so there were 2 presidents.
FDR .....Franklin Roosevelt and Harry Truman
Franklin D. Roosevelt and Harry S. Truman.
Woodrow Wilson was the US president during WW I.
It would be helpful if you specified which World War. Woodrow Wilson was President through World War I. Franklin Delano Roosevelt and Harry S Truman were both Presidents during World War II.
Franklin Delano Roosevelt and Harry Truman, in that order.
During the Vietnam War, Presidents Kennedy and then Johnson were democrats.
Several of presidents have fought in wars. Eisenhower, Kennedy, Nixon, Ford, Carter, and Bush Sr. all fought in World War II alone.