<a href="https://en.wikipedia.org/wiki/Korean_War" id="mwzA" rel="mw:WikiLink" title="Korean War">Korean War</a>: Communist Chinese troops launch a massive counterattack (<a href="https://en.wikipedia.org/wiki/Battle_of_the_Ch'ongch'on_River" id="mwzQ" rel="mw:WikiLink" title="Battle of the Ch'ongch'on River">Battle of the Ch'ongch'on River</a> and <a href="https://en.wikipedia.org/wiki/Battle_of_Chosin_Reservoir" id="mwzg" rel="mw:WikiLink" title="Battle of Chosin Reservoir">Battle of Chosin Reservoir</a>) against United Nations and South Korean forces.