秦王嬴稷(秦(qín )昭王)当政(🥇)不久,列(🐌)国展开一系列兼(jiān )并战(zhàn )争。秦国看(🍥)准时机,先与齐连横,攻略魏国大片土(😧)地。由(yóu )此,战国进(jìn )入(🌗)秦齐赵(zhào )三国(🚤)并(🖲)强阶段(duàn )。此时(🎩),秦国(🛍)国内宣太(👁)后掌(zhǎng )政(zhèng ),穰侯(hóu )魏冉等“四(sì )贵”专(zhuān )权、(🥞),秦昭(zhāo )(🍮)王王(🙁)权旁落(luò )。然而外部局(jú )势对秦国十(⏺)分(fèn )有(yǒu )利(lì )(📎):纵横家苏秦(qín )与燕(yàn )王(wáng )秘约赴齐(qí ),以灭秦为(wéi )目标“死间(🗞)”齐国(guó )。面对国内政治困(🙄)局和国外有(💪)利机遇,秦(🍄)王(⛏)嬴稷毅然起用范雎,放(😍)逐(💠)魏冉等(děng )“四(🎋)贵”、废太后之权而恭养之。同时,与苏(💔)秦合谋(móu )(🍑),五国联军在燕将乐毅(yì )率领(🌹)下攻破齐(🥋)国都城临(lín )(💅)淄。秦王嬴(🐩)稷遣(😝)将白起,相(🎥)继在伊阙、郢(yǐng )都、华阳、长(zhǎng )(💏)平(📸)发动(🔷)四(sì )大(dà )战役,歼灭了韩魏齐(qí )楚赵(🌂)百