Biography. He joined the army in 1934 (infantry regiment 8 in Frankfurt/Oder) and participated in the Invasion of Poland in 1939. One year later he was dismissed from the army by Hitler's Prinzenerlaß, following the death of his elder brother Prince Wilhelm of Prussia, who was wounded in France on 23 May 1940 and died in a Field hospital in Belgium three days later.
Issue. Frederick William II of Prussia (1744–1797) . married (1) Elisabeth Christine of Brunswick-Lüneburg.They had one child Princess Frederica Charlotte of Prussia (1767–1820), who married Prince Frederick, Duke of York and Albany, the second son of George III of the United Kingdom.