Twelfth Army

Twelfth Army or 12th Army may refer to:

Germany

 * 12th Army (German Empire), a unit in World War I
 * 12th Army (Wehrmacht), a unit in World War II

Russia

 * 12th Army (Russian Empire), a unit in World War I
 * 12th Army (RSFSR), a Red Army unit in the Russian Civil War
 * 12th Army (Soviet Union), a unit of the Soviet Army

Other countries

 * Twelfth Army (Japan), a unit of the Imperial Japanese Army
 * Twelfth Army (United Kingdom), a unit of the British Army
 * Twelfth Army (Italy), a unit in World War I
 * 12th Army (Austria-Hungary), a unit in World War I