Peter III (10 February 1728 17 July 1762) was Emperor of Russia from 5 January 1762 until 9 July of the same year, when he was overthrown by his wife, Catherine II (the Great). He was born in the German city of Kiel as Charles Peter Ulrich of Schleswig-Holstein-Gottorp (), but he was a grandson of Peter the Great and a great-grandson of Charles XI of Sweden. Peter III could hardly speak Russian and pursued a strongly pro-Prussian policy, which made him an unpopular leader. The two countries were on opposing sides of the Seven Years' War, and Russian troops were threatening Berlin at the time of Peter's accession to the throne. He immediately switched sides in the war and withdrew his troops from Prussia, undoing hard-earned gains. He was deposed by troops loyal to his wife, Catherine, who, despite her own German origins, was a Russian nationalist. She succeeded him as empress. Peter died in captivity soon after his overthrow, perhaps with Catherine's approval as part of the coup conspiracy. However, another theory is that his death was unplanned, resulting from a drunken brawl with one of his guards. Despite his generally poor reputation, Peter III made some progressive reforms during his short reign. He proclaimed religious freedom and encouraged education, sought to modernize the Russian army, abolished the secret police, which had been infamous for its extreme violence, and made it illegal for landowners to kill their serfs without going to court. Catherine reversed some of his reforms and carried through others, notably the annexation of church property. Early life Peter was born in Kiel, in the duchy of Holstein-Gottorp. His parents were Charles Frederick, Duke of Holstein-Gottorp, and Grand Duchess Anna Petrovna of Russia. Charles Frederick was a grandson of Charles XI of Sweden, and Anna was a daughter of the Russian monarchs Peter the Great and Catherine I. Peter's mother died shortly after his birth. In 1739, Peter's father died, and he became Duke of Holstein-Gottorp as Charles Peter Ulrich () at the age of 11. When Peter's aunt Elizabeth became Empress of Russia, she brought Peter from Germany to Russia and proclaimed him her heir presumptive in the autumn of 1742. Previously in 1742, the 14-year-old Peter was proclaimed King of Finland during the Russo-Swedish War (1741–1743), when Russian troops held Finland. This proclamation was based on his succession rights to territories held by his