The Battle of Kasenberg (Vierz: Schlacht um Kasenberg; Luepolan: Kasenbergska Bitva) was a decisive battle in the Great War, fought between the Luepola and the Vierz Empire over the Vierz city of Kasenberg from October 1944 to May 1945. With the participation of over 3 million personnel and 2 million casualties, it remains both the largest and bloodiest battle in world history.