Answer:
A very long time ago, I'd say 1400's-1500's or even longer before that.
Oman and Yemen are both located in the southern end of the Arabian peninsula. The other countries in the other parts of the peninsula include Qatar, Saudi Arabia, UAE, Kuwait, Bahrain, and some parts of Iraq + Jordan.
Let me know if you need anything else. :)
- Dotz
So they could get more resources faster like silk and spices.
