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from Medieval Latin Borussi, Prusi, Latinized forms of the native name of the Lithuanian people who lived in the bend of the Baltic before being conquered 12c. and exterminated by (mostly) German crusaders who replaced them as the inhabitants. Perhaps from Slavic *Po-Rus "(The Land) Near the Rusi" (Russians). The duchy of Prussia after union with the Mark of Brandenberg, became the core of the Prussian monarchy and later the chief state in the German Empire.
Former state in north-central Germany. At the height of its power, Prussia occupied more than half of present-day Germany, stretching from The Netherlands and Belgium in the west to Lithuania in the east.
Note: During the eighteenth century, Prussia established its independence from Poland, built up a strong army, and undertook a successful conquest of north-central Europe.
Note: In the nineteenth century, Prussia led the economic and political unification of the German states, establishing itself as the largest and most influential of these states, with Berlin as the capital of the German Empire.
Note: After Germany's defeat in World War II, Prussia was abolished as a state, and its territory was divided among East Germany, West Germany, the Soviet Union, and Poland.
Note: Prussians are often depicted as authoritarian, militaristic, and extremely orderly, a characterization based on the unswerving obedience of their army.