Collection of facts about the Russian Empire

This post is a collection of facts about the Russian Empire (1721-1917). There are 15 facts listed below. Source: Wikipedia

• Preceded by the Tsardom of Russia (1547-1721)
• Peter I ruled as first emperor 1721-1725
• Catherine the Great ruled 1762-1796
• Occupied Alaska 1799-1867
• Alexander I ruled 1801-1825
• Decemberist revolt (1825)
• Defeated in the Crimean War (1853-1856)
• 23 million serfs emancipated in 1861
• Russian Revolution of 1905
• State Duma created in 1905
• Allied with U.K. and France during World War I (1914-1918)
• Nicholas II overthrown during the February Revolution (1917)
• Newly formed Russian Republic overthrown during the October Revolution (1917)
• Romanov family murdered in 1918
• Followed by the Russian Civil War and the Soviet Union