How was the Mahdist government modeled on early Islamic institutions?

The Mahdist government, established by Muhammad Ahmad (the Mahdi) in the Sudan, was intentionally modeled on the institutions of primitive Islam to reflect his mission of religious renewal.1

Key aspects of this emulation included:

• Appointment of Caliphs: In a direct parallel to the early Islamic period, the Mahdi appointed four deputies, or khalīfahs, to serve as successors. This mirrored the structure of the four earliest caliphs in Islamic history.1
• Terminology: The Mahdi adopted specific nomenclature from the time of the Prophet Muhammad. His followers were known as the anṣār ("helpers"), a term originally used for the Prophet’s early supporters in Medina.21
• Governance Principles: While the Mahdi left most routine administrative tasks to his officers, he directed community and personal life through proclamations and sermons based on the principles of early Islam. He also mandated that taxes be collected according to the Qurʾān rather than the previous Egyptian administrative demands.1
• Succession: The Mahdi referred to himself as the "successor to the apostle of God," viewing his role as a continuation of the Prophet Muhammad’s work.1