Czech Legionnaires on an armored train during the Russian Civil War. The Czech Legion was a unit of the Russian army which remained loyal to the Allies. When they ran afoul of Trotsky and the Bolsheviks, the Czechs decided to fight their way out of Russia to the Pacific coast on armored trains like this one. Their anabasis broke Red strength in Siberia and allowed anti-Bolshevik forces there to organize.