Year 608, King Jinpyeong ordered Monk Won-Gwang to write a letter to the Sui dynasty, asking them for assistance to attack Goguryeo, knowing that the Emperor of Sui wasn't happy about Goguryeo's refusal of paying tributes. When King Yeongyang heard of it, he attacked Silla and took over Woo Myeong fortress and captured 8,000 people of Silla. Year 611, King Jinpyeong asked Sui again to attack Goguryeo again. July of the same year, Kajam fortress was invaded by the Baekje. The next year, Emperor Yang of Sui decided to attack Goguryeo with more than 1 million troops. However, Sui lost and retreated just few months after the attack. The Emperor of the Sui dynasty continued to attack Goguryeo for the next 3 years out embarrassment for their lost, but still ended up in failure. Year 616, Baekje attacked Mosan Fortress but retreated right away. Year 618, the Sui dynasty has fallen and was succeeded by the Tang dynasty . That same year, King Jinpyeong ordered Byeon Poom to take back Kajam fortress from the Baekje but failed to do so. After that loss, King Jinpyeong sent a diplomat to the new dynasty of Tang, in order to establish a diplomatic relationship between their countries. Year 623, Baekje attacked Neuk Noh of Silla. Year 624, Baekje surrounded 6 fortresses of Silla. General Nool Choi fought back bravely but was only able to take back 3 of those fortresses. Year 625, King Jipyeong sent a messenger to Tang and told them that Goguryeo was blocking Silla's route from paying tributes to Tang. Emperor Taizong of Tang, asked Goguryeo to stop attacking Silla, which the King of Goguryeo heed to. Year 626, Baekje conquered Jujae fortress of Silla and killed the official of Dong So. Silla decided to build Go Hyeo fortress to prepare for the future attack. Year 627, General Sa Gyeol of Baekje, took 2 fortresses from the western part of Silla and capture its residence. Year 628, Silla succeeded in taking Kajam fortress back. Year 629, Kim Yongsu and Kim Seo Hyun, conquered Nangbi fortress of Goguryeo. Because of non-stop wars against the Baekje and Gogurye, Silla became very poor and resulted to famine. Many families sold their children and lands. May of 631, Chilseok and Seokpum planned a rebellion but their plan was discovered early and, as a result, Chilseok was beheaded in the marketplace along with his entire