The Teutonic Knights, who were directly subjected to the Pope, came to the adjacent lands of Culm at the request of Masovia's Konrad. The main aim of the Teutonic Knights was to help Konrad in the Crusade versus the Prussians. The Prussians practiced the pagan religion. Earlier Konrad had made several conquest attempts on the Prussians but in vain. The Teutonic Knights found the success in the first few attempts and made promises to expand further.
To counter these forces, the Kingdom of Poland and the Grand Duchy of Lithuania got united and resisted the Teutonic Knights. The cavalry units of the joined forces proved too strong for the Teutonic Knights. Many Teutonic warriors were held captive and later released.
The effects of the Battle of Grunwald in Belarus were large. After the Belarus Battle of Grunwald, the Belorussian State (Great Lithuanian Principality) was expanded to the Baltic Sea. In Eastern Europe, Belarus gradually emerged as one of the most powerful nations.

