Alternative History
Alternative History
Ethiopian-Somali Monarchy
የኢትዮጵያ ሶማሌ ንጉሳዊ አገዛዝ
Ye’ītiyop’iya Somalē Nigusawī Āgezazi
(Amharic)

ቦቆርቶኦያዲኢ ኢቶኦቢያ-ሶኦመሊዳ
Boqortooyadii Itoobiya-Soomaalida
(Somali)

Ethiopia-Somalia
Timeline: Triangles and Crosses
OTL equivalent: Ethiopia, Somalia, Eritrea and Djibouti
Austria-Hungary (government)
Flag of Ethiopia-Somalia (TaC) Imperial coat of arms of Ethiopia (Haile Selassie)
Flag Coat of arms
Map of Ethiopia-Somalia (TaC)
Localization of Ethiopia (green) and Somalia (yellow).
CapitalAddis Ababa
Mogadishu
Largest city Addis Ababa
Other cities Hargeisa
Gondar
Mek'ele
Official languages Amharic
Somali
Religion 71.2% Christianity
27.6% Islam
1.2% Others
Demonym Ethiopian
Somalian
Government Federal parliamentary constitutional dual monarchy
 -  Monarch Zera Selassie
 -  Premier of Ethiopia Abiy Ahmed
 -  Prime Minister of Somalia Hassan Sheikh Mohamud
Legislature Imperial Parliament
 -  Upper house Consultative Assembly
 -  Lower house House of Representatives (Ethiopia)
National Assembly (Somalia)
Establishment
 -  Ethiopian Empire 1270 
 -  Campaigns of the Horn 16th–18th century 
 -  Solomon Era 1870–1914 
 -  Admitted to the Society of Nations 20 September 1948 
 -  Compromise of 1950 31 January 1950 
 -  Derg 12 September 1974 
 -  Cyan Revolution 19 November 2006 
 -  Current constitution 21 August 2009 
Area
 -  Total 1,882,757 km2 
726,937 sq mi 
Population
 -  2023 estimate 136,407,447 
Gini (2020) 39.8 (high) 
HDI (2020) 0.741 (high) 
Currency Birr (ETB)
Time zone UTC+3 (EAT)
Date formats dd/mm/yyyy
Drives on the right
Internet TLD .et
.so
Calling code +251

Ethiopia-Somalia, officially the Ethiopian-Somali Monarchy, is a constitutional dual monarchy located in the Horn of Africa. It shares borders with the Indian Ocean to the east, Sudan to the northwest, White Nile to the west, and East Africa to the south, while also sharing maritime borders with Arabia by the Red Sea and the Gulf of Aden. While fitting in the conditions of a country, Ethiopia-Somalia considers itself a military and diplomatic alliance of two sovereign states with a single monarch. While it doesn't have a defined capital, Addis Ababa serves as the primary capital of the union, where the Monarchy and the Consultative Assembly sits.

The Ethiopian Empire began with Yekuno Amlak in 1270, who inaugurated the Solomonic dynasty, who claimed descent from the biblical Solomon and Queen of Sheba under their son Menelik I. By the 14th century, the empire grew in prestige through territorial expansion and fighting against adjacent territories, during the Campaigns of the Horn, in which Ethiopia expanded throughout the Gulf of Aden until the Jubba River.

In the Solomon period, Ethiopia adopted a Western-style constitution, worked to be more involved with European nations, especially Russia and Greece, and pursued a program of industrialization and modernization. During the World War II, it briefly sided with Russia, before being pressured by the United Commonwealth. In 1950, amidst growing nationalism, the empire was reformed into the Ethiopia-Somalia monarchy, siding with the Western powers during the Cold War. Between 1974 and 2006, the country was ruled by the socialist military junta of the Derg. With the Cyan Revolution, the country became again a democracy, adopting a new constitution.