Battle of Kaniów
Battle of Kaniv, or Battle of Kaniów took place during World War I on the night of 10–11 May 1918, near Kaniv, Ukraine between Polish and German army troops. The fighting pitted the Polish II Corps in Russia, under General Józef Haller von Hallenburg, against the German Imperial Army, under General Franz Hermann Zierold. Ultimately the Germans were victorious with about half of the Polish forces surrendering and the rest retreating in disarray.
Background
On 15 February, protesting against the Treaty of Brest-Litovsk which reduced the chances for the creation of an independent Poland, the II Brigade of the Polish Legions, formerly part of the Austro-Hungarian Army, broke through the frontline near Rarańcza and merged with the Polish units formerly in the Russian Army, joining the newly formed Polish II Corps in Russia. The Germans, however, saw the II Corps as troublesome, and decided to ensure it would be disarmed, or would otherwise be incapacitated.On 18 April the II Corps was ordered by the Regency Council to stop near Kaniv in Ukraine; in a triangle between Potik, Kozyn and Stepantsi. Soon it began to be surrounded by nearby German units. On 6 May the commander of the 28th German Landwehr Brigade, General Zierold, subordinate of Marshal Hermann von Eichhorn, issued an ultimatum to the II Corps, demanding it lay down its arms and surrender. II Corps readied for battle and surprised Zierold, who was unprepared for battle. Zierold backed down saying that the ultimatum was a miscommunication. Soon however Zierold received reinforcements, which convinced him he had enough strength to force the issue. German army in the battle was reinforced by several Ukrainian haydamak regiments.