Shafto: You don't know what the reconquista is either. But you're not alone. Centuries of disinformation do their toll.
Crazy Anglican: Try the Taiping Rebellion. That's 20,000,000 to 30,000,000 + That was a religious war only a century and a half ago. Setting up the Congo Free State caused 8,000,000 to 10,000,000 deaths. The Rape of Nanking caused 42,000 to 400,000 deaths in one day. The Rawandan Genocide caused 500,000 to 1,000,000 deaths. Aztec human sacrifice caused 300,000 to 1,500,000 deaths. The Ottoman conquest of Cyprus resulted in ~30,000–50,000 Christian deaths. The Siege of Tripolitsa during the Greek War of Independance caused caused around 35,000 to 40,000 deaths in three days, exterminating the Jewish population and killing tens of thousands of Turks. The Massacre of the Latins in 1182 killed ~60,000–80,000 within a month. The Hama Massacre against the Muslim Brotherhood resulted in 7,000 to 40,000 deaths in one day. The Hamidian massacres against the Armenians resulted in 80,000 to 300,000 deaths. The Armenian Genocide resulted in 1,500,000 to 2,000,000 deaths less than 100 years ago. 260,000 to 262,000 Muslims in Bulgaria were killed in 1878. The Algerian War resulted in 500,000 to 1,500,000 deaths. The Dungan revolt of Muslims in China resulted in 8,000,000 to 12,000,000 deaths including civilians and soldiers. The Yellow Turban Rebellion, related to Daoism, caused 3,000,000 to 7,000,000 deaths. The Thirty Years' War, undoubtedly religious in nature, caused 3,000,000 to 11,500,000 deaths. Need I go on?
Famine and political repression in Cambodia caused 1,700,000 to 3,000,000 deaths.