Short answers, pulled from the story.
Alexander Nevsky was born on the 13th of May 1221 in Pereslavl-Zalessky as the second son of Grand Prince Yaroslav II of Vladimir. His mother was a daughter of Mstislav Mstislavich, which linked him to powerful regional families.
He defeated Swedish forces led by Birger Jarl at the confluence of the Izhora and Neva rivers on the 15th day of July 1240. He also halted German crusaders from the Teutonic Order during the Battle on the Ice on Lake Peipus in April 1242.
Alexander chose to submit to the Golden Horde because he viewed the West as a greater threat than the Mongols. This strategic decision preserved the Eastern Orthodox Church while allowing foreign powers to dominate the region.
Alexander died on the 14th of November 1263 in Gorodets-on-the-Volga after taking monastic vows under the name Alexey. Macarius Metropolitan of Moscow canonized him as a saint in 1547.
Catherine I introduced the imperial Order of Saint Alexander Nevsky on the 21st of May 1725. Soviet authorities revived this memory by introducing the Soviet Order of Alexander Nevsky in 1942 during World War II.