In 1950 the Korean War broke out, and Communist China announced its "oppose America, aid Korea" slogan and dispatched troops to Seoul.
「當時美國朝野的左傾思潮相當普遍，也不斷試圖向剛崛起的中共政權示好」，中研院近史所研究員張朋園指出。只可惜，「熱臉貼上了冷屁股」，一九五○年北韓入侵南韓，韓戰爆發，中共隨即悍然打出「抗美援朝」口號，揮軍漢城。這下子，中共「共產國際顛覆者」的嘴臉表露無遺。