A Teutonic fief became the engine of German unity
Prussia began not as a kingdom but as a secularized remnant of crusader lands. In 1525 the Teutonic Order's Prussian territory became a Lutheran duchy under Hohenzollern rule; by 1871 that house's army-forged state had welded Germany into an empire—only to be abolished by Allied decree in 1947.
The name recalls Baltic Old Prussians conquered by the Teutonic Knights in the thirteenth century. Invited by Duke Konrad of Masovia in 1226 after failed Polish crusades, the Order built an independent monastic state, later absorbing Livonia when the Sword Brothers joined in 1237. Flat fertile soils made the region Western Europe's "bread basket," feeding Hanseatic ports from Danzig to Königsberg. Conquest of Pomerelia and Danzig in 1308 poisoned ties with Poland; at Grunwald in 1410 a Polish–Lithuanian alliance shattered the Knights. The Thirteen Years' War and Second Peace of Thorn (1466) split the land: western Royal Prussia under Poland, eastern Prussia as a Polish fief.
On 10 April 1525 in Kraków's main square, Grand Master Albert of Hohenzollern resigned his Order office, took the title Duke of Prussia from King Zygmunt I, and secularized the lands as a Lutheran duchy—the first Hohenzollern foothold "east of the Vistula." Marriage politics united that duchy with Brandenburg in 1618 under Elector John Sigismund, creating scattered Brandenburg-Prussia. Swedish armies trampled the pieces in the Thirty Years' War; Elector Frederick William (1640–1688) rebuilt the military. The realm became a kingdom in 1701 with capitals shifting from Königsberg to Berlin, entered great-power ranks, and under Frederick the Great (1740–1786) spoke loudly in European councils.
Victory over Napoleon brought Ruhr coal and other gains at Vienna (1814–15). Prussia dominated the North German Confederation (1867) and the German Empire (1871), its Junkers increasingly calling themselves Germans. The monarchy fell in 1918; a 1932 Papen coup gutted the Free State's autonomy, and Allies branded Prussia a vessel of militarism before abolishing it in 1947. Black-and-white colors from Teutonic and Hohenzollern heraldry, the motto Suum cuique of Frederick I's Black Eagle Order, and the Iron Cross of 1813 became lasting emblems of a state outsiders still shorthand as rigid, military, and conservative.
Source: Prussia
