The Teutonic Knights were a German religious order formed in 1190, in the city of Acre, to aid Christian pilgrims on their way to the Holy Lands and to operate hospitals for the sick and injured in Outremer. After Muslim forces captured the Holy Lands, the order moved to Transylvania in 1211 and later, after being expelled, invaded pagan Prussia with the intention of Christianizing the Baltic region. Yet, both before and after the Order's main pagan opponent, Lithuania, converted to Christianity, the Order had already attacked other Christian nations such as Novgorod and Poland. The Teutonic Knights' power hold, which became considerable, was broken in 1410, at the Battle of Grunwald, where the Order suffered a devastating defeat against a joint Polish-Lithuanian army. After Grunwald, the Order declined in power until 1809 when it was officially dissolved. There were ten crusades in total.