叙(xù )述战(🍅)国(guó )(🌠)时代(dài ),齐国的田单运(yùn )用战略战胜燕国(🕋),收复山(shān )河(🔱)的史(shǐ )(🤢)实燕国地处东(🎹)北,在(🐉)燕(yàn )(🛤)王哙时,国都(dōu )曾被(💤)齐国(🎾)攻下,到了时,强愤图强,礼聘贤才,并(bìng )以乐毅为(wéi )将(jiāng )军,使(🕯)燕(👁)国(guó )军事力量强大起来(🚥)。后来(lái )燕(yàn )国联合各(gè )国攻打齐国(guó ),几(jǐ )(🖍)乎快灭了齐国,幸而齐国(⏺)田(tián )单用(yòng )(📎)反间计使燕(🌚)王撤(🚨)换乐(lè )毅将军,再(💱)出奇不意(yì )的以(yǐ )火牛阵(🗞)攻敌,才(✋)一(yī )举驱逐燕(🤸)军,收复国土,是为田单复国。