Structure and Geographical Organization

Futuh al-Buldan is organized geographically rather than chronologically, which reflects al-Baladhuri's purpose: his aim was to provide a comprehensive account of how each region came under Islamic authority and what its subsequent administrative history was, rather than to produce a straightforward chronological narrative of the conquest campaigns. This organizational choice makes the work a unique tool for regional history: a reader interested in the conquest and early administration of Syria, Egypt, Iraq, Persia, or any other region can turn directly to the relevant section and find a concentrated treatment of that region's history.

The work begins with the Arabian Peninsula, covering the Prophet's campaigns and the early caliphate's consolidation of Arabia under Islamic authority. It then moves systematically outward through the major regions of the Islamic world: Syria and its cities (Damascus, Homs, the Hawran, Palestine, the coastal cities); Iraq (the conquest of al-Hira, the battles that defeated the Sasanian Empire, the founding of Kufa and Basra); the Jazira (upper Mesopotamia); Armenia and Azerbaijan; Egypt and North Africa; Persia (Khurasan, Fars, Kirman, and the eastern provinces); and the Central Asian and Indian frontier regions. A section on the Arab presence in Byzantine territory and the early Islamic administrative arrangements in Syria is particularly detailed.

Within each regional section, the coverage is not purely narrative. Al-Baladhuri includes information about the administrative structures established by the conquering armies and their commanders, the tax arrangements negotiated with conquered populations, the treatment of pre-existing religious communities (Christians, Jews, Zoroastrians), and the establishment of garrison cities (amsar) that became the nuclei of the new Islamic urban order. This administrative information is among the most valuable in the work and makes it an essential source for the history of the early Islamic state.

The work also includes significant information about the organization of the Arab tribal groups that settled in conquered territories, the development of the diwan (administrative register) system for distributing stipends, and the early history of land ownership and taxation in the conquered provinces. These topics connect the military history of the conquests to their long-term social and economic consequences.