In the 7th century Silla allied itself with the Chinese Tang dynasty. In 660, under Muyeol of Silla (654-661), Silla subjugated Baekje. In 668, under King Munmu of Silla (King Muyeol's successor) and General Gim Yu-sin, Silla conquered Goguryeo to its north. Silla then fought for nearly a decade to expel Chinese forces on the peninsula intent on creating Tang colonies there to finally establish a unified kingdom as far north as modern Pyongyang. The northern region of the defunct Goguryeo state later reemerged as Balhae.