It was President Ulysses S. Grant.
Answer:
They thought they could discover some more land then they would have more land which means more power to them. If they had enough power then that means that they would be more powerful and wealth.
Explanation:
Answer: The first theory is trade. The expansion of trade among West Asia, India and Southeast Asia helped the spread of the religion as Muslim traders brought Islam to the region. Gujarati Muslims played a pivotal role in establishing Islam in Southeast Asia. The second theory is the role of missionaries or Sufis.
Explanation: Hope this helps!