晚唐五代城防戰頻繁,促進攻守技術日益發達。由於中晚唐以來實行職業雇傭兵制度,而城防戰不僅涉及動員大量人力物力,亦往往不能速戰速決,意味着對戰雙方背負沉重的後勤及財政負擔,戰爭内容重點不僅是對城市的攻守,還包括如何持續地供養己方在戰場的部隊和破壞敵方的糧道。比如梁晉夾河之戰,傳統看法認爲優勢騎兵是晉軍的關鍵因素,卻低估了梁晉雙方沿河進行的多場城防戰鬥的關鍵性。 Late Tang and Five-City anti-war frequent, to promote offensive and defensive techniques are increasingly developed. Due to the implementation of the professional mercenary system since the middle and late Tang dynasties, the city anti-war not only involves mobilizing a large amount of manpower and resources, but also often can not make quick decisions. This means that both sides of the war bear heavy logistics and financial burdens. The focus of the war is not only on the city’s offensive and defensive positions, It also includes how to continually support our own troops on the battlefield and undermine the enemy’s food security. Such as the Liang Jin Jiahe war, the traditional view that the advantages of cavalry is the key factor in the Jin army, but underestimated the Liang and Jin along the river for more than the key to urban defense fighting.