Answer: frontier settlers
Explanation:
Islam spread through military conquest, trade, pilgrimage, and missionaries.
Arab Muslim forces conquered vast territories and built imperial structures over time.
Most of the significant expansion occurred during the reign of the Rashidun from 632 to 661 CE, which was the reign of the first four successors of Muhammad.
The caliphate—a new Islamic political structure—evolved and became more sophisticated during the Umayyad and Abbasid caliphates.
The supremacy law that establishes the federal government establishes that the state governments must be subordinate to the federal authority. In line with this law, whenever the interests of the federal government collide with those of state governments, the interest of federal government shall always supersede.
<span />
