Pedzisa mutsara unotevera: Muna 936, Umambo Hwapashure Hwematatu hwakabatanidzwa naWang Geon, muzukuru wevakuru veGoguryeo, uyo akasimbisa Goryeo senyika yakatevera yeGoguryeo. Balhae yakanga yawira muUmambo hweKhitan muna 926, uye makore gumi gare gare muchinda wekupedzisira weBalhae akatizira kumaodzanyemba kuGoryeo, kwaakagamuchirwa noushamwari uye akabatanidzwa mumhuri inotonga naWang Geon, nokudaro achibatanidza marudzi maviri akatsiva Goguryeo. Kufanana neSilla, Goryeo yakanga iri nyika ine tsika zvikuru, uye yakagadzira muchina wokudhinda unochinjika wesimbi. Pashure pokukunda Umambo hweKhitan, uhwo hwakanga huri umambo hune simba zvikurusa hwenguva yacho, muHondo yeGoryeo<unk>Khitan, Goryeo yakawana nguva yegoridhe iyo yakagara zana ramakore, mukati maro Tripitaka Koreana yakapedzwa uye kwakanga kune zviitiko zvikuru mukudhinda uye kubudisa, kukurudzira kudzidza uye kuparadzira zivo pamusoro pefilosofi, mabhuku, chitendero, uye sayenzi; panosvika 1100, kwakanga kune mayunivhesiti gumi nemaviri akabudisa nyanzvi dzakakurumbira uye masayendisiti. Zvisinei,
Kupinda kwevaMongol muzana remakore rechi13 kwakaderedza zvikuru umambo hwacho. Goryeo haina kumbobvira yakundwa nemaMongol, asi yapera simba mushure memakumi matatu emakore ekurwa, dare reKorea rakatumira muchinda waro kumuzinda weYuan kunopika kuvimbika kuna Kublai Khan, uyo akabvuma, uye akaroora mumwe wevanasikana vake kumuchinda weKorea. Kubvira ipapo zvichienda mberi, Goryeo yakaramba ichitonga Korea, kunyange zvazvo yaiva mubatanidzwa wevaMongol kwemakore 86 akatevera. Munguva iyi, nyika mbiri idzi dzakabatana sezvo madzimambo ose akazotevera eKorea akaroora madzishe eMongolia, uye mambokadzi wokupedzisira wedzinza reYuan aiva mambokadzi weKorea. Pakati pezana remakore rechi14, Goryeo akadzinga vaMongol kuti adzorere nzvimbo dzayo dzokuchamhembe, akakunda Liaoyang kwenguva pfupi, uye akakunda kupindirwa neRed Turbans. Zvisinei, muna 1392, mukuru wemauto Yi Seong-gye, uyo akanga arayirwa kuti arwise China, akachinja mauto ake ndokuita coup.