The military conflict between Goguryeo and Baekje started in 369 A.D.，which lasted for one and a half centuries，with a mixed record of victories and defeats on both sides.When they were roughly equal in the contest of strength，within Goguryeo there emerged a political division，one called “the North Expedition Camp” that intended to expand the empire northward，while the other “the South Expedition Camp” that argued for a continued effort to squeeze Baekje to its south.The increasingly distanced tributary exchange between Goguryeo and the Southern Dynasty was an indicator of the intensity of this factional struggle within Goguryeo.After the Anzang Emperor，there had been a series of policy changes within Goguryeo.The Anyuan Emperor held a hesitant attitude to merely observe the situation.When it came to the Yangyuan Emperor，there was a transition from the dominance of the “Southern Expedition Camp” to that of its Northern counterpart.Finally，during the Pingyuan Emperor's reign，there was a significant national policy reorientation，where the aim then was to maintain peace in the south and the expansion of the state was turned to its northwest.From this onwards，Goguryeo reached an end of bicentennial conflict with Baekje，starting a new period of gradual alliance and a concerted effort to pressure Xinluo.