This Battle is considered to be one of the most important historical events of Lithuania and one of the largest battles, which took place in the Medieval Europe. It took place on the 15th of July 1410 between the Teutonic Order and the joint forces of the Grand Duchy of Lithuania and the Kingdom of Poland led by the King of Poland Jogaila and the Grad Duke of Lithuania Vytautas.
Due to the Lithuanian army's manoeuvre performed by Vytautas, namely false retreat, the Crusaders were surrounded and defeated. The outcome of the battle meant the collapse of the Teutonic Order's power and the halt in expansion to neighbouring territories.
In the history of Poland, the Battle of Zalgiris is known as the Battle of Grunwald and in Germany and other Western countries it is known as the Battle of Tannenberg.