The Ridda Wars (Arabic: حُرُوب ٱلرِّدَّة), or Apostasy Wars, were a series of military campaigns launched by the Caliph Abu Bakr against rebel Arabian tribes during 632 and 633, just after the death of the Islamic Prophet Muhammad. Many rebels followed either Musaylimah, Tulayha, Sajjah, or Aswad Ansi, all of whom claimed to be prophets. Some rebels said that they had submitted to Muhammad as the prophet of Allah, but owed nothing to Abu Bakr. The rebel tribes were defeated and forced back into the control of the caliphate. A detailed reconstruction of the events is complicated by the frequently contradictory and tendentious accounts found in primary sources.