Duke Mu of Qin vs Tiridates I of Armenia

Duke Mu of Qin led campaigns against the Rong and Di barbarian tribes to the west, conquering twelve minor states and opening up 1,000 li of territory. This expansion strengthened Qin and secured its western flank.

Duke Mu formed an alliance with the state of Jin, marrying his daughter to Duke Hui of Jin. However, when Jin reneged on promises, Duke Mu attacked and defeated Jin at the Battle of Han, capturing Duke Hui.

Duke Mu supported the exiled prince Chong'er, sending troops to help him return to Jin and become Duke Wen. This act created a powerful ally but also a future rival who would challenge Qin's dominance.

Duke Mu's attempt to expand eastward was thwarted by Jin at the Battle of Yao. Qin forces were ambushed and destroyed in a narrow pass, forcing Duke Mu to abandon eastern ambitions and focus on the west.

Tiridates I accepted the Treaty of Rhandeia, which ended the Roman-Parthian war over Armenia. Under the treaty, Tiridates was recognized as King of Armenia but agreed to receive his crown from the Roman emperor, making Armenia a client kingdom.

Tiridates I traveled to Rome and was formally crowned King of Armenia by Emperor Nero in a public ceremony. This event established the Arsacid dynasty in Armenia under nominal Roman suzerainty, ending the Roman-Parthian war over Armenia.

Tiridates I became the first Arsacid king of Armenia, founding a dynasty that would rule Armenia for nearly four centuries. This established a Parthian royal line in Armenia, blending Parthian and Armenian cultures.