恒山国 / Hengshan State
恒山国 / Hengshan State enters the wiki through 《资治通鉴·周纪》75-4丨为什么说管仲才是经济战的鼻祖？, where it is the target in 管仲’s “恒山之谋.” The episode says Hengshan is known for weapons production, which lets 齐国 use unusually high prices for arms to redirect local labor toward forging and away from agriculture.
The source then adds a second pressure point: Qi buys grain at high prices, drawing food out of Hengshan and neighboring markets before closing passes, stopping purchases, and attacking. Hengshan therefore functions in the wiki as a source-scoped case where industrial specialization, staple-food exposure, and border dependence become military vulnerability.