"Kilroy Was Here" is a graffiti phenomenon that emerged during the Second World War, becoming a symbol of hope and unity among Allied soldiers. Featuring a bald-headed figure peering over a wall with the phrase beneath, this graffiti appeared in diverse locations across Europe and the Pacific. Its origins are attributed to American shipyard inspector James J. Kilroy, whose chalk markings on inspected rivets sparked the creation of this enduring emblem of camaraderie and morale.