Yan
... that Yan, a fourth kingdom during the Three Kingdoms period of China, was conquered only one year after its establishment in 237?
... that <b id="mwBOg"><a href="./Yan_(Three_Kingdoms)" id="mwBOk" rel="mw:WikiLink" title="Yan (Three Kingdoms)">Yan</a></b>, a fourth kingdom during the <a href="./Three_Kingdoms" id="mwBOo" rel="mw:WikiLink" title="Three Kingdoms">Three Kingdoms</a> period of China, was conquered only one year after its establishment in 237?