Goguryeo's ally within the southwest, Baekje, fell on the Silla?�Tang alliance in 660; the victorious allies ongoing their assault on Goguryeo for the subsequent 8 several years. In the meantime, in 666 (nevertheless dates differ from 664??66), Yeon Gaesomun died and civil war ensued among the his a few sons. https://trentonj3tf0.isblog.net/the-fact-about-goguryeo-room-salon-that-no-one-is-suggesting-43962980