 Nyora kupfuurira kweiyi ndima - Muna 212 AD, mukati mokutonga kwaCaracalla, ugari hweRoma hwakapiwa kuvagari vose vakasununguka vomumambo. Asi pasinei nechiratidzo ichi chokupararira kwose, umambo hwaSeveran hwakanga hune nyonganyonga - kutonga kwamambo kwaipera nguva dzose nokupondwa kwake kana kuti kuurayiwa - uye, pashure pokuparara kwahwo, Umambo hweRoma hwakakundwa neCrisis of the Third Century, nguva yokupinda kwehondo, kurwisana kwevanhu vomunyika imwe chete, kusagadzikana kwezvoupfumi, uye denda. Pakutsanangura nhambo dzenhau, dambudziko iri dzimwe nguva rinorangarirwa sechiratidzo chokuchinja kubva kuClassical Antiquity kuenda kuLate Antiquity. Aurelian akatonga 270275 akadzosa umambo kubva parutivi rwokuparadzwa ndokuhutsigira. Diocletian akapedza basa rokudzorera umambo zvizere, asi akaramba basa romukuru ndokuva mambo wokutanga kunzi nguva dzose mutongi, tenzi kana kuti ishe. Kutonga kwaDiocletian kwakaunzawo nhamburiko yakabatanidzwa zvikurusa youmambo mukurwisana netyisidziro inorangarirwa kuchiKristu, Kutambudza Kukuru. 