A

* Ahom Kingdom – The Ahom Kingdom * * – Kingdom of Alodia * Andorra – Principality of Andorra *

Aragon Aragon ( , ; Spanish and an, Aragón ; ca, Aragó ) is an autonomous community in Spain, coextensive with the medieval Kingdom of Aragon. In northeastern Spain, the Aragonese autonomous community comprises three provinces (from north to sou ...

– Crown of Aragon * – Duchy of Athens *

Ayutthaya Kingdom The Ayutthaya Kingdom (; th, อยุธยา, , IAST: or , ) was a Siamese kingdom that existed in Southeast Asia from 1351 to 1767, centered around the city of Ayutthaya, in Siam, or present-day Thailand. The Ayutthaya Kingdom is conside ...

* – Tepanec Empire ** ** ** **

B

* * * * – Viscountcy of Béarn * Bosnian Kingdom * Burgundian Netherlands * * Byzantine Empire

C

* – Barony of Carbery * Castile – Crown of Castile * Catalonia – Principality of Catalonia * – Rajahnate of Cebu * * * – Cherokee Tribe * – Kingdom of Chimor * – Chinese Empire * – Kingdom of Connacht * * – Creek Tribe * – Kingdom of Cusco

E

* – Kingdom of East Breifne * England – Kingdom of England * – Despotate of the Epirus * – Ethiopian Empire

F

* – Kingdom of France

G

* Golden Horde *

Granada Granada (,, DIN 31635, DIN: ; grc, Ἐλιβύργη, Elibýrgē; la, Illiberis or . ) is the capital city of the province of Granada, in the autonomous communities of Spain, autonomous community of Andalusia, Spain. Granada is located at the fo ...

– Emirate of Granada

H

* Holy Roman Empire * – Kingdom of Hungary * * – Huron Tribe

I

* Iroquois – The Iroquois League

J

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

– Ashikaga Shogunate

K

Kalmar Union The Kalmar Union (Danish language, Danish, Norwegian language, Norwegian, and sv, Kalmarunionen; fi, Kalmarin unioni; la, Unio Calmariensis) was a personal union in Scandinavia, agreed at Kalmar in Sweden, that from 1397 to 1523 joined under ...

* * – Sultanate of Kashmir, Gabari Tajik dynasty * ( Joseon Dynasty)

L

* – Lan Xang Hom Khao *

Lithuania Lithuania (; lt, Lietuva ), officially the Republic of Lithuania ( lt, Lietuvos Respublika, links=no ), is a country in the Baltic region of Europe. It is one of three Baltic states and lies on the eastern shore of the Baltic Sea. Lithuania ...

– Grand Duchy of Lithuania *

M

* * * – Sultanate of Malwa * Mamluk Sultanate (Cairo) * – Mayapan, Cocom dynasty * * – Moghulistan, or the Eastern Chagatai Khanate ** * Moldavia – Principality of Moldavia * ** * – Despotate of Morea * – Sultanate of Morocco * – Kingdom of Mutapa * Mysore – Kingdom of Mysore

N

* * Naples – Kingdom of Naples *

Navarre Navarre (; es, Navarra ; eu, Nafarroa ), officially the Chartered Community of Navarre ( es, Comunidad Foral de Navarra, links=no ; eu, Nafarroako Foru Komunitatea, links=no ), is a foral autonomous community and province in northern Spain, ...

– Kingdom of Navarre

O

* Osraige * * Ottoman Empire – Sublime Ottoman State

P

* Papal States * Poland – Kingdom of Poland * Portugal – Kingdom of Portugal

Q

* * – Kingdom of Quito

R

* Ryukyu **

Hokuzan , also known as before the 18th century, located in the north of Okinawa Island, was one of three independent political entities which controlled Okinawa in the 14th century during Sanzan period. The political entity was identified as a tiny co ...

Chūzan was one of three kingdoms which controlled Okinawa in the 14th century. Okinawa, previously controlled by a number of local chieftains or lords, loosely bound by a paramount chieftain or king of the entire island, split into these three more so ...

Nanzan Nanzan (), also known as Sannan (山南) before the 18th century, located in the south of Okinawa Island, was one of three independent political entities which controlled Okinawa in the 14th century. The political entity was identified as a tiny ...

S

County of Santa Fiora The County of Santa Fiora ( it, Contea di Santa Fiora), also known as State of Santa Fiora ( it, Stato di Santa Fiora, links=no) was a small historical state of southern Tuscany, in central Italy. Together with the county of Sovana, it was one of ...

* Scotland – Kingdom of Scotland * Serbia – Serbian Despotate * – Tribe of Shawnee * – Kingdom of Sukhothai * Sultanate of Sulu

T

Tartu Tartu is the second largest city in Estonia after the Northern European country's political and financial capital, Tallinn. Tartu has a population of 91,407 (as of 2021). It is southeast of Tallinn and 245 kilometres (152 miles) northeast of ...

– Bishopric of Tartu * Texcoco * Thomond – Kingdom of Thomond * Timurid Empire – Timurid dynasty * Tlatelolco * Tlaxcala – Tlaxcallan Confederacy * – Kingdom of Tondo * – Empire of Trebizond

V

W

* Wallachia * West Breifne – Kingdom of West Breifne

Z

* – Zapotec tribe * Zeta – Principality of Zeta {{Lists of sovereign states by year , expanded=CE

1400 Year 1400 ( MCD) was a leap year starting on Thursday (link will display the full calendar) of the Julian calendar. The year 1400 was not a leap year in the Proleptic Gregorian calendar. Events January–December * Henry IV of England ...