内外夹击 pincer attack
Explanation
比喻从内部和外部同时进行攻击或施压。
A metaphor for simultaneous attack or pressure from both internal and external sources.
Origin Story
话说三国时期，蜀汉丞相诸葛亮率领大军北伐，意图一举攻克魏国。魏国大将司马懿早已料到诸葛亮的意图，采取了内外夹击的策略。一方面，司马懿派兵坚守城池，严防蜀军攻城；另一方面，他又秘密派遣一支精兵，绕道抄袭蜀军的粮草供应线。诸葛亮虽然用兵如神，但在司马懿内外夹击之下，也感到了巨大的压力。蜀军的后勤供应受到了严重威胁，军心也开始动摇。诸葛亮无奈之下，只得下令撤军。这场战役，最终以魏国的胜利而告终。内外夹击，让蜀军的北伐计划彻底失败。
During the Three Kingdoms period, Zhuge Liang, the chancellor of Shu Han, led a large army on a northern expedition to conquer the Wei kingdom. Sima Yi, the general of the Wei kingdom, had already anticipated Zhuge Liang's plan and adopted a strategy of simultaneous attack from both inside and outside. On the one hand, Sima Yi dispatched troops to defend the city and strictly prevented the Shu army from attacking the city. On the other hand, he secretly dispatched a contingent of elite troops to raid the supply lines of the Shu army. Although Zhuge Liang was a brilliant military strategist, under the pressure of Sima Yi's pincer movement, he also felt tremendous pressure. The logistical supply of the Shu army was severely threatened, and morale began to waver. Zhuge Liang had no choice but to order a retreat. The battle ended in a victory for the Wei kingdom. The simultaneous attack from the inside and outside led to the complete failure of the Shu army's northern expedition.
Usage
多用于军事和政治斗争方面，形容同时从内部和外部进行攻击或施压。
Mostly used in military and political struggles to describe the simultaneous attack or pressure from both internal and external sides.
Examples
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敌军内外夹击，我军腹背受敌。
díjūn nèiwài jiā jī, wǒjūn fùbèi shòudí
The enemy attacked from both inside and outside, and our army was caught in a pincer movement.
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面对敌人的内外夹击，他们团结一心，顽强抵抗。
miàn duì dírén de nèiwài jiā jī, tāmen tuánjié yīxīn, wánqiáng dǐkàng
Faced with attacks from inside and outside, they united as one and fought bravely.
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公司面临内外夹击，业绩下滑严重。
gōngsī miàn lín nèiwài jiā jī, yèjī xiàhuá yánzhòng
The company is facing difficulties from inside and outside, and its performance has declined sharply.