The Rashidun Caliphate (632-661 CE) was the period of the first four caliphs, or successors to the Prophet Muhammad.

The Rashidun, meaning 'Rightly Guided' Caliphs, were Abu Bakr, Umar, Uthman, and Ali.

This period is considered a golden age in Sunni Islam, with the leaders chosen for their piety and closeness to the Prophet.

Under the Rashidun, the Arab-Muslim armies began the major phase of Islamic expansion.

The caliphate conquered the entire Sassanian (Persian) Empire and seized vast territories from the Byzantine Empire, including Syria, Egypt, and North Africa.

The second Caliph, Umar, established the 'diwan,' a state registry for managing the army and state finances.

The third Caliph, Uthman, is credited with overseeing the compilation of the definitive, standardized text of the Quran.

The caliphate was marked by internal political turmoil, especially after Umar's death.

The reign of the fourth Caliph, Ali, was defined by the First Fitna, or civil war, which created a lasting schism in Islam.

The Rashidun Caliphate ended with the assassination of Ali and the establishment of the dynastic Umayyad Caliphate.