Context: After Christianization, the Roman Catholic Church and local rulers led German expansion and settlement in areas inhabited by Slavs and Balts, known as Ostsiedlung. During the wars waged in the Baltic by the Catholic German Teutonic Knights; the lands inhabited by the ethnic group of the Old Prussians (the current reference to the people known then simply as the "Prussians"), were conquered by the Germans. The Old Prussians were an ethnic group related to the Latvian and Lithuanian Baltic peoples. The former German state of Prussia took its name from the Baltic Prussians, although it was led by Germans who had assimilated the Old Prussians; the old Prussian language was extinct by the 17th or early 18th century. The Slavic people of the Teutonic-controlled Baltic were assimilated into German culture and eventually there were many intermarriages of Slavic and German families, including amongst the Prussia's aristocracy known as the Junkers. Prussian military strategist Karl von Clausewitz is a famous German whose surname is of Slavic origin. Massive German settlement led to the assimilation of Baltic (Old Prussians) and Slavic (Wends) populations, who were exhausted by previous warfare.

Question: The Expansion of Germany  by the Catholic Church into the areas of the Slavs and balts is know as what?
Answer: Ostsiedlung

Question: What was the name of the group that waged war in the Baltic?
Answer: Catholic German Teutonic Knights

Question: Who was the Old Prussians ethnic group related to?
Answer: Latvian and Lithuanian Baltic peoples

Question: Although conquered the Persian language lived on till when?
Answer: 17th or early 18th century

Question: Who is a famous German that  name has Slavic origins?
Answer: Karl von Clausewitz

Question: When was the Prussian language extinct?
Answer: 17th or early 18th century

Question: What happened to the Slavic people of the Baltic?
Answer: were assimilated into German culture

Question: Who led the German expansion?
Answer: the Roman Catholic Church and local rulers

Question: What famous German military strategist has a name with Slavic origin?
Answer: Karl von Clausewitz

Question: What let to the assimilation of Baltic and Slavic populations?
Answer: Massive German settlement

Question: What language was extinct by the 1700 or early 1800's
Answer: Unanswerable

Question: Who conquered the Catholic German Teutonic Knights?
Answer: Unanswerable

Question: Who held back the German expansion?
Answer: Unanswerable

Question: What was the German aristocracy known as?
Answer: Unanswerable