Northern Crusades: In the Battle on the Ice, Novgorod forces led by Alexander Nevsky rebuffed an invasion attempt by the Teutonic Knights at Lake Peipus on the present-day border of Estonia and Russia. Battle on the Ice: The Battle on the Ice, also known as the Battle of Lake Peipus, took place on 5 April 1242. It was fought on the frozen Lake Peipus when the united forces of the Republic of Novgorod and Vladimir-Suzdal, led by Prince Alexander Nevsky, emerged victorious against the forces of the Livonian Order and Bishopric of Dorpat, led by Bishop Hermann of Dorpat. April 5, 1242. Wiki link