Silla was one of The Three Kingdoms of Korea along with Goguryeo and Baekje. Tang was a Chineese Dynasty. Great King Jinheung of Silla had requested that the kings after him would take over the other two kingdoms of Korea and unite them. In order to do this General Kim Yusin of Silla agrees with Tang Dynasty on Kim Chuncu’s (Silla King) demand. After the alliance was made both Silla and Tang armies attack Baekje. After a long strugle Baekje falls. 6 years after this Silla-Tang Alliance took over Goguryeo after 3 unsuccesfull atempts. Silla had finally ruled over whole Korea. Silla had become Unified Silla and dissolved relations with Tang after they had decided to aid the poor people that escaped the invasions.