What is Baekje–Tang War?

The Baekje–Tang War was fought between Baekje and the allied forces of Tang China and Silla between 660 and 663. It was in some respect a spillover of the, at the time, ongoing Goguryeo–Tang War. After numerous attacks and raids by the combined forces of Baekje and Goguryeo, King Muyeol of Silla sought help from Emperor Gaozong of Tang to aid his exhausted kingdom. Emperor Gaozong granted his request and launched the invasion of Baekje in 660. After the conquest of Baekje later that year, loyalist forces from Baekje with the aid of Yamato allies attempted to resist the occupation of their kingdom until the two allied forces were destroyed in 663.