Objective of the study: This study aims to highlight the role of non-Muslim civilians local to the conquered lands and their contributions that support the campaigns, seeing how important these contributions were to said campaigns, and with no threat to being posed by them to the lives of Muslim soldiers, especially after the dismantlement of the conquered region armies, and their military power broken which rendered all their contribution secondary in the conquered provinces.

Methodology: The study employed the historical-analytical method, as it has defined the somatic and chronological framework of its prior stated aim. The study focused on the early years of the Islamic period, which fell between (3-40 AH / 625-660 AD)

Findings:

The study highlights the un refutable role of the non-Muslim local civilians and their contributions in the Islamic conquest, as some Arab Christians from the Levant and Iraq, motivated by a sense of ethnic and national sentiment and easing the task of conquest, contributed to combat operations against the Persians and Romans. Most of their contributions, however, were limited to administrative and logistic tasks. Such as: intelligence gathering, reconnaissance, and tracking enemy movements, whether it be voluntary or a stipulated by peace treaties. As well as providing Muslim armies with necessary supplies, constructing bridges for military crossings, repairing roads, and guiding Muslim forces to enemy weaknesses and through enemy routes. Furthermore, Jews and Christians welcomed Arab conquerors, seeking relief with them from past regimes such as the Byzantine or Persian states, in exchange for the exemption from the pole tax (Jizya). Nevertheless, their contributions do not amount to them being granted personal credit for the conquest which, though not denying the value of the local civilians' contributions, could not have been achieved without the strength and valour of the Muslims.

Conclusion: These non-military civilian groups helped facilitate the Islamic conquests either by maintaining neutrality, engaging directly in combat—as was the case with some Arabs of levantine  and Iraq motivated by kinship ties—or by serving as guides for the Muslim armies, in addition to conducting intelligence work in support of the Arab conquerors.