Answer:
The takeover of South Vietnam by the communist North was completed on April 30, 1975, two years after the United States signed a peace treaty with Hanoi and pulled out its combat troops after a decade-long struggle. This gave the responsibility for the war to the South Vietnamese
Explanation:
-spread Islam to Iran and Afghanistan, go's with: -Arabs
-spread Islam into Hindu-dominated India, go's with: -Ghaznavids
-traveled trade routes to spread Islam, go's with: -Muslim missionaries
Hoped this helped! (Again)
It should be to pay off the national debt