秦王(🕕)嬴稷(秦昭王)当政不(bú )(📼)久,列国展(zhǎn )开一系(🕋)列兼并战(zhàn )争。秦(🤢)国看准(🎺)时机,先(xiān )与齐(qí )(🐉)连横,攻(gōng )略魏国(guó )大(dà )片(piàn )土地。由此(cǐ )(👋),战国进入秦齐(♑)赵(zhào )(📼)三国并强阶段(duàn )。此时,秦国国(guó )内宣太(👁)后(hòu )掌(zhǎng )政,穰(🥄)侯魏冉等“四贵”专(🎿)权、,秦昭王王(🙁)权旁(páng )(🚸)落(luò )(🖍)。然(rán )而(ér )外部局势对秦(🔊)国十分有利(📎):(🧚)纵横家苏秦与(🚨)燕(yàn )王秘约赴(fù )齐,以灭秦(🎛)为目标“死间”齐国。面对国(guó )内政(zhèng )治(🌞)困局和国外有利(⛓)机遇,秦王嬴稷(jì )毅(👃)然起用范(fàn )(🤲)雎(🕙),放(fàng )逐魏(👺)冉等“四(🎋)贵”、废太后之权而恭养(👣)之。同(tóng )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淄。秦王嬴(yíng )稷遣将(jiāng )白起,相继在伊(🤔)阙(què )(📧)、郢都、华阳、长平发(🥤)动四(sì )(👵)大战役,歼灭了韩魏齐(qí )楚赵(zhào )百