Upon the fall of Baekje in 660 due to the invasion by the Tang army, Tamna developed its own diplomacy starting with the dispatch of an envoy to Tang in the same year ("Tang Huiyao" [Institutional History of Tang]).
660年に百済が唐軍の侵攻によって滅亡すると、耽羅は独自の外交を展開し、同年には唐へ使いを派遣した（『唐会要』）。