Buddhism came to China from India in the 1st century AD. Though not fundamentally embraced by each of the varying Chinese dynasties, it did expand and reached the Northern Korean kingdom of Koguryo in 372 AD. The teachings then proceeded Southward to Paekche in 384 AD.
Buddhism was introduced to Silla during the reign of King Nul Chi (417-457 AD). Two Buddhist missionaries, Chong Bang and Myolgubi, arrived during the early part of his reign and they were put to death. The monks, Hukhoja and Ado arrived from Koguryo later in his rule. Near the time of their arrival, King Nul Chi's daughter became ill. Hukhoja cured the princess by burning incense in her presence and making a vow to one of the Bodhisattvas. This cure brought the King's favor and Buddhism was accepted by the Silla aristocracy.
As time progressed on the Korean Peninsula, Buddhism vacillated between favor and outrage within the varying Korean dynasties. By the sixth century, Koguryo, though predominately adhering to a Confucian doctrine, accepted elements of Buddhism into its overall philosophic canon. Po Duk, one of the preeminent Koguryo Buddhist monks of this period, traveled to China where he amassed a large amount of Buddhist scriptures. Upon returning to his kingdom, he attempted to veer the Koguryo government away from any adherence to Confucianism. Unsuccessful, he left for the Kingdom of Paekche, where Buddhism flourished. In Paekche, Buddhism was so universally accepted that in 600 AD King Pop instigated a law that forbid the taking of any life, including animals.