Year 632 (DCXXXII) was a leap year starting on Wednesday (link will display the full calendar) of the Julian calendar. The denomination 632 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Arabia March 18 (approximate) – Muhammad makes his final sermon to the Muslims. It is believed by Shia to be the appointment of Ali ibn Abi Talib as his successor. The Imamah (Shia doctrine) of Ali Ibn Abi Talib, for the religious, spiritual and political leadership of the Ummah, begins. June 8 – Muhammad dies at Medina at the age of 63, after an illness and fever. June – Abu Bakr (also known as Abdallah ibn Uthman ibn Amir, better known by his Islamic laqab Al-Siddiq) becomes the Caliph. Ridda Wars: Abu Bakr launches a series of military campaigns against rebel Arabian tribes, to re-establish the power of the Rightly Guided Caliphs, and to secure Muhammad's legacy. September – Battle of Buzakha: An Islamic column (6,000 men) under Khalid ibn al-Walid defeats the Apostate rebels under Tulayha, near Ha'il (Saudi Arabia). December – Battle of Aqraba: The Muslim forces of Abu Bakr defeat the Apostate rebels (40,000 men) under Musaylimah, on the plain of Aqraba. Europe April 8 – King Charibert II is assassinated at Blaye (Gironde), (possibly on orders of his half-brother Dagobert I), along with his infant son. Dagobert I claims Aquitaine and Gascony, becoming the most powerful Merovingian king in the West. Part of Samo's rebellion, Alciocus leads 9,000 Bulgars from Pannonia to refuge with Dagobert (who massacres them), then, with 700 survivors, settles with the Wends, under the protection of Walluc. Kubrat, ruler of the Dulo clan, takes power from the Pannonian Avars and establishes Old Great Bulgaria in the area of Black Cumania. Kubrat's rule stretches from Dacia to Poltava. Persia June 16 – Yazdegerd III, age 8, ascends to the throne as king (shah) of the Persian Empire. He becomes the last ruler of the Sassanid Dynasty (modern Iran). Asia January 27 – An annular eclipse of the sun occurs. Seondeok is crowned queen of Silla (Korea). Armenia The 632 Armenia earthquake affects the region of the Armenian Highlands. By topic Religion March 6 (Friday, 9 Zulhijja, 10 AH) – The Farewell Sermon (Khuṭbatu l-Wadāʿ) is delivered by Muhammad, Islamic prophet, in