Battle of Zborov ( 1917 ) The Battle of Zborov ( " bitva u Zborova " in Czech , " bitka pri Zborove " in Slovak ) was a small part of the Kerensky Offensive , ( the last Russian offensive in World War I , taking place in July 1917 ) . The battle was the first significant action of the Czechoslovak Legions ( volunteers fighting against the Central Powers ) on the Eastern Front and the only successful action of the failed offensive . Background . As the reliability of many Russian military formations was in doubt , only units that volunteered to attack were used in the offensive . Among those who did was the ' Czechoslovak Riflemen Brigade ' ( " Československá střelecká brigáda " ) formed from three regiments of Czechs and Slovaks . The brigade ( about 3 , 500 men ) , was low on equipment and training . Moreover , this was the first use of the brigade as a single formation ; previously , the Russian command had used only smaller units of the brigade , mostly in reconnaissance actions . The brigade was commanded by Russian colonel V . P . Trojanov , but the tactical assault plan was prepared by Czech officers . The brigade was deployed near Zborov , a town in today ' s Ukraine , in a sector of secondary importance . The 4th division protected it from the north , the 6th division from the south . The enemy , the army of Austria - Hungary , deployed four well entrenched and well equipped infantry regiments ( IR ) , the IR 6 , 35 , 75 and 86 ( in all , about 12 , 000 men ) . Battle . At 5 : 15 on July 2 , the second day of the offensive , after an initial artillery bombardment , small groups of Legionnaires equipped with grenades attacked the enemy ( see : Shock troops tactic ) . After they breached the barbed wire defenses , follow - up units continued with the attack . By 15 : 00 the Legion had advanced deep into enemy territory , breaking through the entire Austrian trench line . 3 , 300 enemy soldiers ( 62 officers ) were captured ; 20 guns and large amounts of war material were seized . The Czechoslovak losses were 167 killed , 17 mortally wounded , 11 missing and around 700 injured . Aftermath . This success had no wider effect on the doomed offensive . The battle , however , gave propaganda and political capital to the leaders of the Czechoslovak resistance and convinced the Russian government to end its limitations on new units formed from Czech and Slovak soldiers captured during the war . Moreover , news of the armed action of the Czech exterior resistance reached the Czech people in Austria - Hungary for the first time . Any reference to Czech volunteers fighting on the side of the Entente was suppressed by censorship . But the surprising victory by the smaller Czechoslovak forces incited some Austrian politicians to demand an investigation of alleged treason by Czech units in the Austro - Hungarian Army and this made the victorious legionaries famous across the Empire . After the war , the battle was used to propagate the heroic military cult surrounding the Legions who formed a cornerstone of the new Czechoslovak state . During the German occupation of Czechoslovakia ( 1939 - 1945 ) , and later , when the communist party took power in 1948 , the story was suppressed or ignored . In the arts . The battle was depicted in a 1938 Czech language propaganda film " Zborov " . The movie was based on a story by Rudolf Medek and directed by Jiří Slavíček and Jan Alfréd Holman . Due to the Munich Agreement , a shortened version of " Zborov " was first screened in January 1939 .