ni akoole ninu ISO 3166-2, apa opagun ISO 3166 ti International Organization for Standardization (ISO) tejadesiwe to setumo awon amioro fun oruko awon ipinsabe koko awon orile-ede.ItokasiISO 3166.. 
Suff Civil wars in the 14th century further sapped the Empire's strength, and most of its ­varro territories were lost in the Byzantine-Ottoman wars, which culminated in the fall of Constantinople and the conquest of ­varro territories by the Ottoman Empire in the 15th century.itọkasi.. 