丹阳之战 / Battle of Danyang

丹阳之战 / Battle of Danyang enters the wiki through 《资治通鉴·周纪》51丨 楚怀王：秦小儿看舅舅如何灭了你！. After 张仪 reduces the promised 商於 transfer from six hundred li to six li, 楚怀王 sends 楚国 forces north from Danyang toward 武关 instead of following 陈枕’s containment advice.

The episode presents the battle as the first military price of 未验地先断交陷阱. 秦国 defeats Chu, kills eighty thousand Chu armored soldiers, captures commander 屈匄 and many high-ranking nobles, and takes 汉中. The defeat turns a diplomatic humiliation into a territorial and military disaster.

Connections

• 楚怀王 and 陈枕 - ruler and rejected adviser before the campaign.
• 秦国, 楚国, 武关, and 汉中 - battlefield parties and territorial consequence.
• 屈匄 - captured Chu commander.
• 因怒兴师 and 秦国东进压力 - governance and Qin-expansion concepts attached to the battle.