安史之乱，是唐玄宗天宝年间安禄山和史思明两位将领发动的一场叛乱。这场叛乱从开始到彻底平定用了七年多的时间。安史之乱，给当时北方中原的广大地区带来了极大的破坏，阻碍了南方长江流域一带的经济发展，对当时政治、经济和社会生活造成了严重影响。可以说，以安史之乱为分水岭，唐朝由强盛走向了衰落。接下来，我们将用9节课的内容，为你介绍安史之乱发生的时代背景、过程和历史影响。
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