Prussian Crusade

thumb|Stages of German eastern settlement in pink and three shades of green; the black line represents Holy Roman Empire borders in 1348 thumb|German language areas in 1910 in today's Poland, [[Kaliningrad Oblast (Russia), Lithuania, and Czech Republic before expulsion of Germans ]] '''' (, ) is the term for the early medieval and high medieval migration of Germanic peoples and Germanization of the areas populated by Slavic, Baltic and Uralic peoples; the most settled area is sometimes known today as . Germanization efforts included eastern parts of Francia, East Francia, and the Holy Roman Em

series of 13th-century campaigns of Roman Catholic crusaders

13th-century revolts by Old Prussians against the Teutonic Knights

1249 battle between Teutonic Knights and Old Prussians