[Republican soldier aiming rifle through wall, University City, Madrid]

[Republican soldier aiming his rifle through a window, University City, Madrid]

[Soldiers standing in lines with their left hand on their rifles, Royal Military Academy, Brussels]

[Republican soldier aiming rifle out window, Teruel, Aragón Front, Spain]

Guerrillas retreat after stripping dead soldier for his uniform and rifle, Chalatenango

[Republican soldier with rifle, Rio Segre, Aragón front, near Fraga, Spain]

[Soldier with rifle standing behind a barricade, Tai'erzhuang, Xuzhou front, China]

[Lee Harvey Oswald standing outside his home holding rifle, Dallas]