Battle of Dytiatyn was one of battles of the Polish–Soviet War of 1919-1921 also referred to as the Polish Thermopylae (together with Battle of Zadwórze and Battle of Wizna). It took place on 16 September 1920 between units of the 8th Polish Field Artillery Regiment from Płock and the 8th Mounted ''Red Cossack'' Division of the Red Army near the village of Dytiatyn (now in Ukraine, northwest of Halicz).