greatest reach into Europe was during the Seven Years' War (1756–1763), which was fought on three continents between Great Britain and France with numerous allies on both sides. In that war, Russia continued its alliance with Austria, but Austria shifted to an alliance with France against Prussia. In 1760, Russian forces were at the gates of Berlin. Fortunately for the Kingdom of Prussia, Elizabeth died in 1762, and her successor, Peter III, allied Russia with Prussia because of his devotion to the Prussian king, Frederick the Great. Peter III had a short and unpopular reign. His father was Charles Frederick, Duke of Holstein-Gottorp. In his Manifesto on the Freedom of the Nobility, Peter III granted civil liberties to the nobility and ended mandatory state service for nobles. While his manifesto was popular, he alienated clergy by decision to pass church lands to the state and created deep resentment by forcing Prussian military drills on the Russian army, and depriving Russia of a military victory by establishing his sudden alliance with Prussia. Making use of the discontent and fearing for her own position, Peter III's wife, Catherine, deposed her husband in a coup, and her lover's brother, Aleksey Orlov, subsequently murdered him, so in June 1762 Catherine became Catherine II, empress of Russia. Era of Russian palace revolutions (chronologically) Catherine I, ruled 1725–1727 Peter the Great had two wives, Yevdokiya Lopukhina (the daughter of a minor noble) and Marfa Skavronskaya (a Lithuanian peasant, renamed Catherine after her conversion to Orthodoxy). Catherine I's rise through Peter I's Table of Ranks, from a simple peasant to empress, embodied the Petrine spirit, making it seem as though Peter I literally “created” her. With the help of Aleksandr Menshikov (her advisor, ex-lover and leader of the palace guards), she gained the throne by emphasizing this connection to Peter I and her maternal nature. Due to her poor health, Menshikov did much of the ruling. With Catherine I's blessing, he created the Supreme Privy Council, which consisted of six or so members. It ultimately took over most of the functions of the Ruling Senate (an advisory body founded by Peter I to oversee judicial, financial and administrative affairs) Almost immediately, Catherine I appointed Peter II, the grandson of Peter the Great, as her successor and she died after only two years of ruling. Peter II, ruled 1727–1730 Peter II was only eleven when he became emperor.