Faduwar Wei, wadda ke nuna karshen daya daga cikin manyan jahohi uku na zamanin daular Uku, wani muhimmin lamari ne a karshen karni na 3 AZ wanda ya sake fasalin yanayin siyasar kasar Sin ta zamanin da.Rushewar jihar Cao Wei da rugujewarta daga karshe ta sanya wani mataki na sake hadewar kasar Sin a karkashin daular Jin, wanda ya kawo karshen wani lokaci na yaki, da makircin siyasa, da rarrabuwar kawuna a daular kasar Sin.Cao Wei, wanda Cao Pi ya kafa, bayan da mahaifinsa Cao Cao ya haɗe arewacin kasar Sin, da farko ya zama mafi ƙarfi a cikin masarautu uku.Duk da haka, bayan lokaci, ta fuskanci kalubale na ciki da na waje wanda sannu a hankali ya raunana karfinta da kwanciyar hankali.A ciki, jihar Wei ta gamu da rigingimun siyasa da gwagwarmayar mulki.A shekarun baya bayan nan na daular Wei, an sami karuwar tasiri da iko da dangin Sima, musamman Sima Yi da wadanda suka gaje shi Sima Shi da Sima Zhao.Waɗannan manyan hakimai da janar-janar a hankali sun kwace mulki daga dangin Cao, wanda hakan ya haifar da raunana ikon daular da sabani na cikin gida.Nasarar juyin mulkin da Sima Yi ta yi a kan shugaba na ƙarshe na dangin Cao, Cao Shuang, ya kasance wani sauyi na koma bayan Wei.Wannan yunƙurin ya canza yanayin ƙarfin iko a cikin jihar yadda ya kamata, wanda ya ba da hanya don sarrafa dangin Sima daga ƙarshe.Kabilar Sima ta hau kan karagar mulki ta kasance ne ta hanyar dabarun siyasa da kawar da abokan hamayya, tare da karfafa tasirinsu kan harkokin jihar.A waje guda kuma, Wei na fuskantar matsin lamba na soji daga kasashen da ke hamayya da su, Shu Han da Wu.Wadannan rikice-rikice sun lalata albarkatu tare da kara fadada karfin sojojin Wei, wanda ya kara tsananta kalubalen da jihar ke fuskanta.Ƙarshe na ƙarshe ga daular Wei ya zo ne tare da Sima Yan (ɗan Sima Zhao) wanda ya tilasta wa sarkin Wei na ƙarshe, Cao Huan, ya sauka daga karagar mulki a shekara ta 265 AZ.Daga nan sai Sima Yan ya shelanta kafa daular Jin, inda ya ayyana kansa Sarkin sarakuna Wu.Wannan ba kawai ƙarshen daular Wei ya yi ba amma kuma ya nuna farkon ƙarshen zamanin Mulkin Uku.Faɗuwar Wei ya nuna ƙarshen canjin mulki a hankali daga dangin Cao zuwa dangin Sima.A karkashin daular Jin, daga karshe Sima Yan ta yi nasarar hada kan kasar Sin, wanda ya kawo karshen tsawon shekaru da dama na rarrabuwar kawuna da yakin da aka yi a zamanin masarautu uku.