As crown prince from 1861, Frederick spent 27 years chiefly in waiting to do something. Thanks to his chief of staff, Leonhard von Blumenthal, he was a successful commander in the Danish War of 1864, the Seven Weeks’ War of 1866, and the Franco-German War of 1870–71. Although Frederick supported Bismarck in the war of 1866, in general the “blood and iron” aspects of Bismarck’s domestic and international policies were alien to him.
Frederick II, byname Frederick the Great, German Friedrich der Grosse, (born January 24, 1712, Berlin, Prussia [Germany]—died August 17, 1786, Potsdam, near Berlin), king of Prussia (1740–86), a brilliant military campaigner who, in a series of diplomatic stratagems and wars against Austria and other powers, greatly enlarged Prussia’s territories …
Prince Frederick William Louis of Prussia (German: Friedrich Wilhelm Ludwig; 30 October 1794 – 27 July 1863) was a Prussian prince and military officer. Family [ edit ] Born in Berlin, Frederick was the son of Prince Louis Charles of Prussia and Duchess Frederica of Mecklenburg-Strelitz , later Queen of Hanover, nephew of King Frederick William III of Prussia and stepson of Ernest Augustus, King of Hanover .
Prince Frederick George William Christopher of Prussia (German: Friedrich Georg Wilhelm Christoph Prinz von Preußen; 19 December 1911 – 20 April 1966), also known as Friedrich von Preussen in the United Kingdom, was the fourth son of Crown Prince Wilhelm of Germany and Duchess Cecilie of Mecklenburg-Schwerin.
The historic Prince Frederick of Prussia married Princess Louise of Anhalt-Bernburg in 1817. At that time, he'd been commanding the 1st Life Cuirassiers regiment of the Royal Prussian Army, which means that he would've been traveling extensively, as Phoebe references in Bridgerton season 1.
Countess Donata of Castell-Rüdenhausen. Georg Friedrich Ferdinand Prinz von Preussen (born 10 June 1976) is a German businessman who is the current head of the Prussian branch of the House of Hohenzollern, the former ruling dynasty of the German Empire and of the Kingdom of Prussia.   He is the great-great-grandson and historic heir of Wilhelm II, the last German Emperor and King of Prussia, who abdicated and went into exile upon Germany's defeat in World War I in 1918.
Friedrich Karl was born at the Royal Palace in Berlin on 20 March 1828, as the only son of Prince Charles of Prussia, the brother of future German emperor William I. From 1842 to 1846, Frederick Charles was under the military tutelage of then Major Albrecht von Roon. In 1845, the Prince joined the army and was sent to an infantry company.
Prince Henry of Prussia: 14 August 1862: 20 April 1929: married, 24 May 1888, his first cousin Princess Irene of Hesse and by Rhine; had issue Prince Sigismund of Prussia: 15 September 1864: 18 June 1866: died of meningitis at 21 months. First grandchild of Queen Victoria to die. Viktoria, Princess Adolf of Schaumburg-Lippe: 12 April 1866: 13 November 1929
Frederick was the son of Crown Prince Frederick William of Prussia and his wife, Sophia Dorothea of Hanover. He was born sometime between 11 and 12 p.m. on 24 January 1712 in the Berlin Palace and was baptised with the single name Friedrich by Benjamin Ursinus von Bär on 31 January. 
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