Czechoslovak Legion

The Czechoslovak Legion (Czech: Československé legie; Slovak: Československé légie) were volunteer armed forces consisting predominantly of Czechs and Slovaks fighting on the side of the Entente powers during World War I and the White Army during the Russian Civil War until November 1919. Their goal was to win the support of the Allied Powers for the independence of the Lands of the Bohemian Crown from the Austrian Empire, and of Upper Hungary from the Kingdom of Hungary, which were then part of the Austro-Hungarian Empire. With the help of émigré intellectuals and politicians such as the Czech Tomáš Garrigue Masaryk and the Slovak Milan Rastislav Štefánik, they grew into a force of over 100,000 troops.

In Russia, they took part in several victorious battles of the war, including the Zborov and Bakhmach against the Central Powers, and were heavily involved in the Russian Civil War fighting Bolsheviks, at times controlling the entire Trans-Siberian railway and several major cities in Siberia.

After three years of existence as a small unit in the Imperial Russian Army, the Legion in Russia was established in 1917, with other troops fighting in France since the beginning of the war as the "Nazdar" company, and similar units later emerging in Italy and Serbia. Originally an all-volunteer force, these formations were later strengthened by Czech and Slovak prisoners of war or deserters from the Austro-Hungarian Army. The majority of the legionaries were Czechs, with Slovaks making up 7% of the force in Russia, 3% in Italy and 16% in France.

The name Czechoslovak Legion preceded and anticipated the creation of Czechoslovakia.

In the first months of World War I, the response of the Czech soldiers and civilians to the war and mobilization efforts were highly enthusiastic; however, it turned into apathy later. As World War I broke out, national societies representing ethnic Czechs and Slovaks residing in the Russian Empire petitioned the Russian government to support the independence of their homelands. To prove their loyalty to the Entente cause, these groups advocated the establishment of a unit of Czech and Slovak volunteers to fight alongside the Russian Army.

On 5 August 1914, the Russian Stavka authorized the formation of a battalion recruited from Czechs and Slovaks in Russia. This unit, called the "Czech Detachment [cs]" (Czech: Česká Družina), went to the front in October 1914, where it was attached to the Russian Third Army. There the Družina soldiers served in scattered patrols performing a number of specialized duties, including reconnaissance, prisoner interrogation and subversion of enemy troops in the opposite trenches.

From its start, Czech and Slovak political émigrés in Russia and Western Europe desired to expand the Družina from a battalion into a formidable military formation. To achieve this goal, they recognized that they would need to recruit from Czech and Slovak prisoners of war (POWs) in Russian camps. In late 1914, Russian military authorities permitted the Družina to enlist Czech and Slovak POWs from the Austro-Hungarian Army, but this order was rescinded after only a few weeks due to opposition from other branches of the Russian government. Despite continuous efforts of émigré leaders to persuade the Russian authorities to change their mind, the Czechs and Slovaks were officially barred from recruiting POWs until the summer of 1917. Still, some Czechs and Slovaks were able to sidestep this ban by enlisting POWs through local agreements with Russian military authorities.

Under these conditions, the Czechoslovak unit in Russia grew very slowly from 1914 to 1917. In early 1916, the Družina was reorganized as the 1st Czecho-Slovak Rifle Regiment. During that year, two more infantry regiments were added, creating the Czechoslovak Rifle Brigade (Československá střelecká brigáda). This unit distinguished itself during the Kerensky Offensive in July 1917, when the Czecho-Slovak troops overran Austrian trenches during the Battle of Zborov.