The First Goryeo-Khitan War was a 10th-century conflict between the kingdom of Goryeo and the Liao dynasty ( the Khitan Empire ) near what is now the border between China and North Korea .

In 993 , the Khitan invaded Attack Goryeo 's northwest border with an army that the Liao commander claimed Statement to number 800,000 .

They forced Motion Goryeo to end Process_end its tributary relations with the Song dynasty , to become Becoming a Liao tributary state and to adopt Agree_or_refuse_to_act Liao 's calendar .

They forced Motion Goryeo to end Process_end its tributary relations with the Song dynasty , to become Becoming a Liao tributary state and to adopt Agree_or_refuse_to_act Liao 's calendar .

Liao gave Giving Goryeo permission to incorporate Cause_to_amalgamate the land between the border of Liao and that of Goryeo , which was occupied Control by Jurchen tribes that were troublesome to Liao , up to the Yalu River .

Liao gave Giving Goryeo permission to incorporate Cause_to_amalgamate the land between the border of Liao and that of Goryeo , which was occupied Control by Jurchen tribes that were troublesome to Liao , up to the Yalu River .

Liao gave Giving Goryeo permission to incorporate Cause_to_amalgamate the land between the border of Liao and that of Goryeo , which was occupied Control by Jurchen tribes that were troublesome to Liao , up to the Yalu River .

In 1115 , Jurchen tribes rebelled Change_of_leadership against their overlords , the Khitan Liao dynasty ( 907–1125 ) , and declared Expressing_publicly the formation of the Jin .

Allying with the Song against their common enemy the Liao dynasty , the Jin promised Commitment to return to the Song the Sixteen Prefectures that had fallen Motion_directional under Liao control Control since 938 .

Allying with the Song against their common enemy the Liao dynasty , the Jin promised Commitment to return to the Song the Sixteen Prefectures that had fallen Motion_directional under Liao control Control since 938 .

The Chinese agreed Agree_or_refuse_to_act but the Jurchens ' quick defeat Conquering of the Liao dynasty combined Cause_to_amalgamate with Song dynasty military failures made Manufacturing the Jin reluctant to cede these territories .