秦王嬴稷(🌠)(秦昭王)(✒)当政不(📼)久,列国展开一(🃏)系(xì )列兼并战(🛍)争(🔱)。秦国看准时机(jī ),先与齐连横,攻略(🏴)魏国大片土地。由此,战国进(jìn )入秦齐赵三国并(🖲)强(⚫)阶段。此(👑)时,秦国国内宣太后掌政,穰侯魏冉等“四贵”专(🎿)权、(🥞),秦(qín )昭王(✖)王权旁(páng )(🚸)落。然而外(wài )部局势对秦国(guó )十分(fèn )(🚢)有利:(🧚)纵(🚣)横家(jiā )苏秦与燕王秘约赴齐,以灭秦(qín )为(wéi )目标(biāo )(🥎)“死间(jiān )”齐国。面对(duì )国内政治困局和国外有利机遇(⏰),秦(qín )(🍄)王(wáng )嬴稷(🤷)毅然起用(yòng )范雎,放(fàng )逐(💠)魏(👺)冉(rǎn )等“四贵(🥕)”、废太后之权(⚾)而恭(🌮)养(👣)之(🗳)。同时,与苏秦合谋,五国(guó )联(lián )军在燕将(jiāng )乐毅率领(lǐng )下攻破齐国都城临淄。秦王嬴稷遣将白起,相(xiàng )继(jì )在伊阙、郢都、(⏲)华(📛)阳、长(zhǎng )(💏)平(📸)发动四大战役(yì ),歼(🍽)灭(🏃)了(🔞)韩魏(wèi )齐(qí )楚赵(zhào )百