Abu Bakr, the 1st Caliph of the Rashidun Caliphate, was one of the main companions of Prophet Muhammad and also his father-in-law through his daughter Aisha. Abu was born in Mecca, Arabia, to Uthman Abu Quhafa and Salma Umm al-Khair. Also regarded as the fourth person who officially converted to Islam, Abu Bakr accompanied Muhammad during several battles, such as the Battle of Uhud and Battle of Badr. However, Abu’s role in those Islamic wars has been debated by historians for many years. Historically, it has been confirmed that he was present during several key events in Muhammad’s life, such as the ‘Farewell Pilgrimage’ and the event of ‘Ghadir Khumm.’ Following Muhammad’s death, Abu Bakr assumed power and started ruling the Rashidun Caliphate. Abu then indulged in the Ridda Wars, for which he increased his army’s strength. The war was against non-Muslims outside the Holy city of Medina and against those who had quit Islam after the death of Muhammad, or even before that. Following the conclusion of the Ridda Wars, Abu Bakr invaded Persia and Syria, but died before the wars culminated. Known as the first Khalifa of Muslims, Abu Bakr died at the age of 60 in Medina.