Glappo (or Glappe) (baptized as "Charles" or "Carolus") was the leader of Warmians, one of the Prussian clans, during the Great Prussian Uprising (1260–1274) against the Teutonic Knights.
 In 1249 Pope Urban IV had installed the papal legate Jacob Pantaleon to aid the Teutonic Order and after the battle at the Durbe, the pope called for a crusade against the Prussians and sent knights who were on their way against the Tatars back to the crusades against the Prussians.
 During those crusades and as a result the unbaptized parts of the Prussians began uprisings and Glappo and his men successfully captured Braunsberg.
 When Glappo ambushed and killed forty people who left the castle to gather firewood and fodder, the Bishop of Warmia decided against trying to defend the town and abandoned it.
 In 1266 large reinforcements for the Teutonic Knights, led by Otto III and John I, co-rulers of Brandenburg, arrived to Prussia.
 They built a castle on the border of Warmian and Natangian lands between Balga and Königsberg and named it Brandenburg (now Ushakovo).
 When a native woman informed Glappo that most of the soldiers were away on a raid and the place is practically unguarded, Warmians attacked and captured the outer walls and the towers.
 When Teutonic soldiers returned, they did not try to recapture the castle.
 The very next year Duke Otto was back to rebuild the castle.
 Glappo was killed trying to recapture Brandenburg.
 In 1273, at the very end of the uprising, Warmians besieged Brandenburg, but did not put sufficient guards on the road from Königsberg.
 This allowed the Knights to attack the Prussians from the rear.
 Warmians suffered a crushing defeat and Glappo was captured.
 He was latter hanged on a hill outside Königsberg that is sometimes referred to as "Glappo's hill" ("Glappenberg").
 He was the last important Prussian leader, and after his death only Pogesanians were left fighting.
Scalovia (Lithuanian: "Skalva" , German: "Schalauen" ) was the area originally inhabited by the now extinct Baltic tribe of Skalvians or Scalovians (Lithuanian: "skalviai" , German: "Schalauer" ) which according to the "Chronicon terrae Prussiae" of Peter of Dusburg lived to the south of the Curonians, by the lower Memel (Nemunas) river, in the times around 1240.
The Scalovians (Lithuanian: "Skalviai" ; German: "Schalauer" ), also known as the Skalvians, "Schalwen" and "Schalmen", were a Baltic tribe related to the Prussians.
 According to the "Chronicon terrae Prussiae" of Peter of Dusburg, the now extinct Scalovians inhabited the land of Scalovia south of the Curonians and Samogitians, by the lower Neman River ca. 1240.
The State of the Teutonic Order (German: "Staat des Deutschen Ordens" ; Latin: "Civitas Ordinis Theutonici" ), also called Deutschordensstaat (] ) or Ordensstaat (] ) in German, was a crusader state formed by the Teutonic Knights or Teutonic Order during the 13th century Northern Crusades along the Baltic Sea.
 The state was based in Prussia after the Order's conquest of the Pagan Old Prussians which began in 1230.
 It expanded to include at various times Courland, Gotland, Livonia, Neumark, Pomerelia and Samogitia.
 Its territory was in the modern countries of Estonia, Latvia, Lithuania, Poland, and Russia.
 Most of the territory was conquered by military orders, after which German colonization occurred to varying effect.
The Prussian Crusade was a series of 13th-century campaigns of Roman Catholic crusaders, primarily led by the Teutonic Knights, to Christianize the pagan Old Prussians.
 Invited after earlier unsuccessful expeditions against the Prussians by Polish princes, the Teutonic Knights began campaigning against the Balts in 1230.
 By the end of the century, having quelled several Prussian Uprisings, the Knights had established control over Prussia and administered the Prussians through their monastic state.
Battle of Pagastin was a medieval battle fought between the Teutonic Knights and Prussians in 1271 during the Great Prussian Uprising (1260–1274).
 Pagan Prussians rose against their conquerors, who tried to convert them to Christianity, after Lithuanians and Samogitians soundly defeated the joint forces of the Teutonic Knights and the Livonian Order in the Battle of Durbe in 1260.
 The first years of the uprising were successful to Prussians, but the Knights received reinforcements from Western Europe and were gaining upper hand in the conflict.
Chronicon terrae Prussiae (Latin for "The Chronicle of the Prussian Land") is a chronicle of the Teutonic Knights, by Peter of Dusburg, finished in 1326.
 The manuscript is the first major chronicle of the Teutonic Order in Prussia and the Grand Duchy of Lithuania, completed some 100 years after the conquest of the crusaders into the Baltic region.
 It is a major source for information on the Order's battles with Old Prussians and Lithuanians.
The Prussian uprisings were two major and three smaller uprisings by the Prussians, one of the Baltic tribes, against the Teutonic Knights that took place in the 13th century during the Prussian Crusade.
 The crusading military order, supported by the Popes and Christian Europe, sought to conquer and convert the pagan Prussians.
 In the first ten years of the crusade five of the seven major Prussian clans fell under the control of the less numerous Teutonic Knights.
 However, the Prussians rose against their conquerors on five occasions.
Peter of Dusburg (German: "Peter von Dusburg" ; Latin: "Petrus de Dusburg" ; died after 1326), also known as Peter of Duisburg, was a Priest-Brother and chronicler of the Teutonic Knights.
 He is known for writing the "Chronicon terrae Prussiae", which described the 13th and early 14th century Teutonic Knights and Old Prussians in Prussia.
The Bartians (also "Barthi", "Barthoni", "Bartens", or "Barti") were an Old Prussian tribe who were among the last pagans of Europe before the Northern Crusades forced their conversion to Christianity.
 They lived in Bartia (also "Bartenland" or "Barthonia"), a territory that stretched from the middle and lower flow of Łyna river, by the Świna river, and Lake Mamry, up to the Galindian woods.
 The territory is quite precisely known from description in Chronicon terrae Prussiae, dated 1326.

Question: Chronicon terrae Prussiae, is a chronicle of the Teutonic Knights, by Peter of Dusburg, finished in 1326, the  manuscript was completed some 100 years after which titled series of 13th-century campaigns of Roman Catholic crusaders, primarily led by the Teutonic Knights, to Christianize the pagan Old Prussians?
Answer: Prussian Crusade