Tannenberg was the first battle won against the Order since the ultimate goal was the headquarters of the Grand Master of the Castle Marienburg (Malbork in Polish) and this fortress was achieved only on July 25, 16 days after the battle of Tannenberg.
The great battle has two names for a reason. The place where the battle took place is called "hill of the firs" (Tannenberg in German language), but around it there was a forest of low trees, "the green forest " (in German dialect Grunwald) and a village called Grunfeld.
The battle was described in a "Chronica Conflictus" contained in "Rerum scriptores Prussicarum" and "Historiae Poloniae" by the Polish canon Jan Dlugosz. This priest knew all the details that shows in his writings by his father, who had directly participated in the battle, as well as many other known survivors and interrogated using the friendships of his father. At the beginning of the war the Knights were able to destroy the right of the Lithuanians, but later had to back off gradually.
When their brave Grand Master Ulrich von Jungingen was killed in the center of the mixture, then the battle was finally lost. In addition to the Grand Master of the Teutonic lost at least 20,000 soldiers and 200 knights including the Grand Commander Conrad von Liechtenstein, Marshal Friedrich von Wallenrod, and many commanders and officers, while the Polish-Lithuanian army suffered 13,000 casualties dead and wounded.