The document summarizes the spread of Islam and the Golden Age of Muslim civilization. Islamic armies conquered lands in North Africa, Persia, Asia, and Spain between 632-661 AD. Their victories were aided by the fall of the Roman Empire and a united religion. The spread of Islam was stopped after defeats at Constantinople in 717 AD and the Battle of Tours in 732 AD. From 800-1100 AD, the Muslim Empire experienced a Golden Age under caliph rule from the capital of Baghdad. Muslim scholars made advances in math, science, and medicine during this period, which was supported by caliph patrons of the arts and sciences.