What year was the battle on the ice? between which states did it happen?

1242 year. On the part of the Russians were the Novgorod Republic and the Vladimir-Suzdal principality, and on the part of the Livonian Order, in addition to the Livonians themselves, Denmark. The battle was of decisive importance in the sense that it protected the Russian lands weakened by the Tatar-Mongol oppression from the aggression of a much more terrible force from the west. The Livonians were forced to conclude peace with the Novgorod Republic, abandoning the recently committed seizures. The battle is celebrated on April 18, it is considered one of the days of military glory of our country.