Explanation

Hazrat Umar Farooq (R.A) is historically associated with the major campaigns related to enforcing Zakat collection from non-compliant areas. Hazrat Abu Bakar Siddique (R.A) dealt with apostasy and tribal revolts but not specifically this war context. Hazrat Usman Ghani (R.A) faced internal challenges, not primarily this specific enforcement campaign. Hazrat Ali (R.A) succeeded the period in question.