Who was the youngest person to fight in WW1?
Mia Lopez
Updated on March 12, 2026
Momčilo Gavrić, in Serbian military from age eight; youngest soldier in World War I in any of the nations which fought in World War I.
What age was the youngest person to fight in WW1?
Momčilo Gavrić was the youngest soldier in WW1 at age 8.The only reason he survived was because he was away from his home at the time. With no home or family, Momčilo Gavrić joined the 6th Artillery Division of the Royal Serbian Army in 1914.