The answers are:
- Started a war with the Japanese
- Promoted interstate relations
- Made trade and travel safe
During the Pax Mongolica the Mongols managed to make the trade and travel safe through the Silk Road. Some of their rulers were promoting nice relations with the other states. But also they have started a war with Japan which ended with great loses for them and contributed to weakening their Empire.
He fought the army during wwi
<span>Until then, fish were caught by Native Americans or just a few commercial fisherman</span>