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 consolidating the state after the Prophet's passing. Hazrat Usman Ghani (R.A) faced internal challenges, not primarily this specific enforcement war. Hazrat Ali (R.A) succeeded Umar and was involved in later political conflicts.