What were relationships like between Christians and Muslims in the Middle Ages?

How did mesopotamia become a center of trade

What new weapon made allied leaders worry about the cost of invading the japanese mainland?

Plz ! the japanese attacked pearl harbol be ( 1 point )a. gain control of the hawaiian islandsb. destroy ships and planes the threatened their expansion efforts c. provoke the united states into declaring ward. demonstrate their support for germany and italy