Which factor contributed to the swift Muslim conquests throughout the Middle East?

The Muslim community spread through the Middle East through conquest, and the resulting growth of the Muslim state provided the ground in which the recently revealed faith could take root and flourish. The military conquest was inspired by religion, but it was also motivated by greed and politics

Explanation:

by 1890, the united states had by far the world's most productive economy. american industry produced twice as much as its closest competitor--britain. but the united states was not a great military or diplomatic power. its army numbered less than 30,000 troops, and its navy had only about 10,000 seamen. britain's army was five times the size of its american counterpart, and its navy was ten times bigger. the united states' military was small because the country was situated between two large oceans and was surrounded by weak or friendly nations. it faced no serious military threats and had little interest in asserting military power overseas.