However, when Goguryeo began to expand its territory southward, moving its capital to Pyongyang in 427, Nulji of Silla was forced to ally with Baekje.
Men da Goguryeo begyndte at udvide sit territorium sydover og flyttede sin hovedstad til Pyongyang i 427, blev Nulji tvunget til at alliere sig med Baekje.