固阳 / Guyang

固阳 / Guyang appears in 《资治通鉴·周纪》17丨韩昭侯和申不害 as a 魏国 place surrounded by 公孙鞅 / 商鞅 for 秦国 in 351 BCE. The source says Guyang’s defenders surrender, making it one of the concrete markers of 秦国东进压力 after Qin has already attacked or taken 安邑.

The page is source-scoped. Guyang matters less as a fully developed local history than as evidence that Qin pressure has crossed into Wei’s strategic depth, helping explain why Wei seeks to repair relations with 赵国 and 齐国.

Connections

• 秦国 and 公孙鞅 / 商鞅 - attacking state and commander.
• 魏国 - pressured state.
• 安邑 - paired Qin pressure point in the source.
• Qin Eastward Pressure / 秦国东进压力 and Territorial Control Churn / 城池反复易手 - broader conflict frames.