Battle of Yanshi
The Battle of Yanshi (Chinese: 偃師之戰) was fought on 5–6 October 618 between the armies of Wang Shichong and Li Mi, rival contenders for the succession of the Sui dynasty. Wang, who was still ostensibly a Sui loyalist and had been blockaded in Luoyang for months by Li, gambled on a decisive battle and led his troops out to attack the besieging army.