| 1 | The Chinese military expedition under Ban Chao, with 70,000 men, reached all the way to the Caspian sea in 97 AD. | |
| 2 | When the Roman's conquered the Parthian capital of Csitephon (sp), they were within 1 day march from Ban Chao's border outpost. | |
| 3 | In AD 97, Ban Chao, the Han Dynasty garrison commander of western regions, sent aide Gan Ying as his personal envoy to Rome, seeking to establish close relation with Roman Empire. |