Queen Sado still refused to give him full control of Silla even after he reached the legal age. She appointed Noribu, as the Sangdaedeung and Hujik as the head of the Military. Noribu died on December of 588, Sueulbu became the next Sangdaedeung after him. King Jinpyeong relied heavily on these two chief officials to solidify his kingdom in both internal affairs and international relations. He also gave the rank of Galmunwang to his brothers Baekban and Gukban, to solidify his power in the court. King Jinpyeong's achievement was the way he strengthened the Kingdom and improved the political system. He named himself, his wife and his younger siblings as people related to the Buddha which eventually made the entire royal family being seen as an especial household for the throne, completely different compared to the rest of the royal nobles. He also built different departments for different political purposes, such as: The Ministry of Culture and Tourism and the Ministry of Education. Buddhism was embraced during this era, as King Jinpyeong actively sent envoys and monks to China to study and help in diplomatic relations. Buddhism in Silla developed as a strong, nation-protecting religion. Year 594, King Jinpyeong sent a diplomat to Sui dynasty of China in order to establish a diplomatic relationship between their countries. Two years later, he sent Monk Damyook to Sui in order to study Chinese Buddhism. Year 602, Amak Fortress was invaded by Baekje forces led by General Hae Su. As a result, King Jinpyeong sent thousands of soldiers to fight them back and built fortresses in Cheonsan, Sota and Wae Seok. However, King Mu of Baekje fought back by sending 40,000 troops to attack the said fortresses. Silla sent General Gunpoom and Mu Eun to fight them back. During the battle, Mu Eun fell into Hae Su's ambush and almost got killed but was saved by his son Gwisan and Chu Hang, however the two were both killed in the battle. The bravery they have shown in their death raised the morale of Silla's army as a result, Baekje forces had no other choice but to retreat. Year 603, King Yeongyang of Goguryeo sent his General, Go Seung to attack the north side of Han Fortress. And so, King Jinpyeong retaliated by leading the army himself with 10,000 troops and succeeded. Year 605, Silla attacked Baekje. However, Goguryeo attacked them as a result.