Western Army

Western Army may refer to:
 * Western Army (Japan), an active army of the Japan Ground Self-Defense Force
 * Western Army (Ottoman Empire), active during the First Balkan War
 * Western Army (Russia), an army of the Russian SFSR formed in 1918
 * Western Army of the White Movement, formed in January 1919
 * the forces of the Toyotomi clan during the Siege of Osaka