During the Warring States period, the king of Wei sent his general Pang Juan to lead troops to attack the state of Zhao. The capital of Zhao, Handan, was in imminent danger, so Zhao sought help from the state of Qi. The king of Qi appointed Tian Ji as the main general and Sun Bin as the military adviser to lead troops to rescue Zhao.
Tian Ji advocated immediately leading troops to Handan to engage in battle with the soldiers of the state of Wei, but Sun Bin did not think so. Sun Bin said, "The soldiers of the states of Wei and Zhao are entangled together, and it is difficult for us to succeed in the war now. The main forces of the state of Wei are attacking the state of Zhao, and the capital city of Wei, Daliang, must be empty. We should turn to attack Daliang instead. In this way, the Wei soldiers will definitely return after learning the news. Not only will we solve the crisis of the state of Zhao, but we can also ambush and intercept the soldiers of the state of Wei halfway." Tian Ji believed that Sun Bin's words were reasonable and turned to attack the capital city of Wei, Daliang.
The King of Wei was very alarmed when he learned that the State of Qi was attacking, so he quickly called for General Pang Juan to lead his troops back. The soldiers of the State of Wei were exhausted, and on the way, they were intercepted and killed by the troops of the State of Qi, resulting in a major defeat before returning home.
In this story, besieging Wei to rescue Zhao has become a classic strategy. By attacking the enemy's critical areas, forcing them to retreat or surrender, a crisis can be resolved and the victory can be achieved. This strategy holds significant importance in warfare and is also applicable to other fields such as business and politics.
战国时期，魏国国王派大将庞涓带兵攻打赵国，赵国都城邯郸危在旦夕，于是赵国向齐国求救。齐国任命田忌为主将，孙膑为军师，带兵前去救助赵国。
田忌主张立刻带兵前往邯郸，与魏国士兵进行交战，可孙膑并不这样认为。孙膑说：“魏国与赵国两国的士兵正纠缠在一起，我们现在去参战很难取得成功。魏国的主力部队都在攻打赵国，魏国的都城大梁一定空虚，我们不如转向进攻大梁。这样，魏兵得知消息后一定会返回来，不但解了赵国的危机，而且我们还可以埋伏在半路上，截杀魏国士兵。”田忌认为孙膑言之有理，并转向进攻魏国的都城大梁。
魏王得知齐国来攻，很是惊慌，便快马急报召大将庞涓带兵返回。魏国士兵人困马乏，很是疲惫，又在半路上遭到了齐国部队的截杀，大败而归。
这个故事中，围魏救赵成为了一种经典的战略。通过攻击敌人的要害部位，迫使敌人撤退或投降，从而解决危机或取得胜利。这种战略在战争中具有非常重要的意义，同时也适用于其他领域，如商业、政治等。
