The Russian advance during the start of the Battle of Kostiuchnówka was also known as what?
Battle of Kostiuchnówka The Battle of Kostiuchnówka was a World War I battle that took place July 4–6, 1916, near the village of Kostiuchnówka (Kostyukhnivka) and the Styr River in the Volhynia region of modern Ukraine, then part of the Russian Empire. It was a major clash between the Russian Army and the Polish Legions (part of the Austro-Hungarian Army) during the opening phase of the Brusilov Offensive.
Battle of Brzostowica The Battle of Brzostowica took place on September 20–25, during the Polish-Soviet War. Polish 3rd Legions Infantry Division, commanded by General Leon Berbecki, clashed with units of the Soviet 15th Army (General August Kork). The Battle of Brzostowica took place in initial stages of the much larger Battle of the Niemen River.