List of proposed state mergers

This is a list of proposed state mergers, including both current and historical proposals. The entities listed below differ from separatist movements in that they would form as a merger or union of two or more existing states, territories, colonies, or other regions, becoming either a federation, confederation, or other type of unified sovereign state.

Current

Proposed state	Components	Notes
Akhanda Bharata	Movement to reunite kindered people of the East Indies or Greater India after colonial partitions by East India Companies: Afghanistan Bangladesh Brunei Bhutan Cambodia India Indonesia Laos Malaysia Maldives Nepal Myanmar Pakistan Philippines Singapore Sri Lanka Thailand Vietnam May also include: East Timor Papua New Guinea	The goal of Bharatavarshaism. Supported by Hindu nationalists and SAARC-ASEAN unionists.
Arab Union	Strictest definition includes members of the Arab League (22): Algeria Bahrain Comoros Djibouti Egypt Iraq Jordan Kuwait Lebanon Libya Mauritania Morocco Oman Palestine Qatar Saudi Arabia Somalia Sudan Syria Tunisia United Arab Emirates Yemen May also include: Eritrea Hatay (part of Turkey) Israel Khuzestan (part of Iran) South Sudan Western Sahara	The goal of Pan-Arabism. Supported by Arab nationalists.
Caribbean Union	Strictest definition includes members of the Caribbean Community (15): Antigua and Barbuda The Bahamas Barbados Belize Dominica Grenada Guyana Haiti Jamaica Montserrat (Part of the United Kingdom) Saint Kitts and Nevis Saint Lucia Saint Vincent and the Grenadines Suriname Trinidad and Tobago May also include: Anguilla (Part of the United Kingdom) Bermuda (Part of the United Kingdom) British Virgin Islands (Part of the United Kingdom) Cayman Islands (Part of the United Kingdom) Turks and Caicos Islands (Part of the United Kingdom)	Movement to re-establish the West Indies Federation.
Catalonia	Andorra Catalonia (Part of Spain) Northern Catalonia (Part of France) Valencian Community (Part of Spain) Balearic Islands (Part of Spain)	Proposed by Catalan separatists. Supported by Catalan nationalists.
Celtic Union	Brittany (Part of France) Cornwall (Part of the United Kingdom) Republic of Ireland Isle of Man (Part of the United Kingdom) Northern Ireland (Part of the United Kingdom) Scotland (Part of the United Kingdom) Wales (Part of the United Kingdom) May also include: Asturias (Part of Spain) Galicia (Part of Spain)	The goal of Pan-Celticism.
File:Flag of the Commonwealth of Nations.svg United Commonwealth	Australia Canada New Zealand United Kingdom May also include: Brunei Cyprus Malta Singapore	Brought up numerous times, especially in Australia, Canada, New Zealand and the United Kingdom, where pressure groups exist.
China	People's Republic of China Republic of China Hong Kong Macau	Chinese reunification is the goal of both governments. Supported by Chinese nationalists.
Cyprus	Republic of Cyprus Turkish Republic of Northern Cyprus	Supported by many Cypriots and the United Nations.
East Africa	Burundi Kenya Rwanda Tanzania Uganda May also include: Somalia South Sudan	Proposed political union between the five member states of the East African Community.
Iberia	Portugal Spain	Brought up multiple times throughout history, starting in the 18th Century. Still some minor support in both Spain and Portugal.^[1]
Ireland	Northern Ireland (Part of United Kingdom) Republic of Ireland	The goal of Irish republicans. Supported by Irish nationalists.
Korea	North Korea South Korea	Korean reunification has been a goal for both Koreas since the 1953 armistice agreement.
Macedonia	Republic of Macedonia Bulgarian Macedonia Greek Macedonia	Supported by Macedonian nationalists.
Israel	Israel Palestine	Many conflicts have happened in Israel and the Palestinian territories ever since the Jewish settled into Palestine.
Nordic Federation	Denmark Finland Iceland Norway Sweden	The goal of Nordism.
Peru-Bolivian Confederation	Bolivia Peru	Proposed by Ollanta Humala in 2011, to re-establish the confederation.[1]
Serbia	Serbia Republika Srpska (Part of Bosnia and Herzegovina)	The goal of Pan-Serbism. Supported by Serbian nationalists.
Romania	Romania Moldova	The movement for the unification of Romania and Moldova is supported by Romanian nationalists.
Union State	Belarus Russia May also include: Abkhazia Kazakhstan Kyrgyzstan Moldova Serbia South Ossetia Transnistria Ukraine	The goal of Eurasianism. Supported by Eurasianists.
Syria	Syria Cyprus Iraq Jordan Kuwait Lebanon Palestine Sinai (Part of Egypt) Hatay (Part of Turkey)	Supported by Syrian nationalists.
File:African Union flag.svg United States of Africa	Strictest definition includes members of the African Union (54): Algeria Angola Benin Botswana Burkina Faso Burundi Cameroon Cape Verde Central African Republic Chad Comoros Democratic Republic of the Congo Republic of the Congo Djibouti Egypt Equatorial Guinea Eritrea Ethiopia Gabon The Gambia Ghana Guinea Guinea-Bissau Ivory Coast Kenya Lesotho Liberia Libya Madagascar Malawi Mali Mauritania Mauritius Mozambique Namibia Niger Nigeria Rwanda São Tomé and Príncipe Senegal Seychelles Sierra Leone Somalia South Africa South Sudan Sudan Swaziland Tanzania Togo Tunisia Uganda Western Sahara Zambia Zimbabwe May also include: Morocco Somaliland	The goal of Pan-Africanism. Supported by Libya, Eritrea, Ghana, Senegal, Zimbabwe and African nationalists. South Africa, Kenya and Nigeria have shown less interest in the idea.^[2]
United States of Europe	Strictest definition includes members of the European Union (28): Austria Belgium Bulgaria Croatia Cyprus Czech Republic Denmark Estonia Finland France Germany Greece Hungary Republic of Ireland Iceland Italy Latvia Lithuania Luxembourg Malta Netherlands Poland Portugal Romania Slovakia Slovenia Spain Sweden United Kingdom May also include: Albania Bosnia and Herzegovina Iceland Kosovo Macedonia Montenegro Serbia Turkey	The goal of Pan-Europeanism. Supported by European nationalists.
United Kingdom of Denmark, Sealand and Elleore	Denmark Sealand Elleore
United Kingdom of Great Britain, Northern Ireland and the Isle of Man	United Kingdom Isle of Man	Some support in both conutries considering the unification of the United Kingdom and the Isle of Man.
Ukraine	Ukraine Transnistria	Some support in both countries considering the unification of Transnistria and Ukraine.

Historic

20th Century

Proposed state	Components	Time period	Successful?	Notes
Arab Federation	Kingdom of Iraq Jordan	1958	Yes (14 February 1958 - 2 August 1958)	An attempt to unify the two Hashemite kingdoms of Iraq and Jordan. While successful, the short-lived union was disestablished after a military coup deposed King Faisal II of Iraq.
Arab Islamic Republic	Libya Tunisia	1974	No	Proposed by Muammar Gaddafi.
Balkan Federation	Albania Bulgaria Yugoslavia	1910	No
Federation of Arab Republics	Libya United Arab Republic Also invited: Iraq Sudan	1972-1977	No	An attempt to build a Pan-Arab state.
Franco-British Union	France United Kingdom	1956	No	Proposed by French Prime Minister Guy Mollet during the Suez Crisis.
Germany	East Germany West Germany	1990	Yes	German reunification
Greek-Serbian Federation	Greece Republic of Macedonia Federal Republic of Yugoslavia	1992-2001	No	A serious project proposed by Slobodan Milošević in 1992.
Greek-Yugoslav confederation	Strictest definition: Greece Kingdom of Yugoslavia Loosest definition also includes: Albania Bulgaria Romania	1942-1944	No
Malaysia	Malaya Sabah Sarawak Singapore	1963	Yes	Singapore left the federation on 9 August 1965.
Międzymorze	Belarus Czechoslovakia Estonia Finland Hungary Latvia Lithuania Poland Romania Ukraine Kingdom of Yugoslavia	November or December 1918	No	Also called "Intermarum". Suggested shortly after World War I to combat the influences of Germany and Russia.
North Borneo Federation	Kingdom of Sarawak British North Borneo Protectorate of Brunei	1956-1960	No
Polish-Czechoslovak confederation	Czechoslovakia Poland	1939–1948	No	A serious project proposed by Władysław Sikorski.
Senegambia Confederation	The Gambia Senegal	Between 1 January 1982 and 30 September 1989	Yes (1 January 1982 - 30 September 1989)	Loose confederation was formed, but ended due to Gambia's lack of interest in integration.
Soviet Union	Byelorussian SSR Russian SFSR Transcaucasian SFSR Ukrainian SSR	1922	Yes (1922 - 1991)	Treaty on the Creation of the USSR
Tanzania	Tanganyika Zanzibar	1964	Yes
Ukrainian People's Republic	Ukrainian People's Republic West Ukrainian People's Republic	1919	Yes (1919)	Act Zluky
Union of African States	Ghana Guinea Mali	1958	Yes (23 November 1958 - 1962)	The Union fell apart in 1962, when Guinea started to reach out to the United States, against the Marxist leaning of the other partners, who were more oriented towards the Cold War adversary of the U.S., the Soviet Union.
United Arab Republic	Egypt Syria	1958	Yes (22 February 1958 - 28 September 1961)	A short-lived Pan-Arab state.
United Arab States	United Arab Republic North Yemen	1958	Yes (8 March 1958 - 26 December 1961)	Loose confederation between United Arab Republic and North Yemen.
Vietnam	North Vietnam South Vietnam	1976	Yes
Yemen	North Yemen South Yemen	1990	Yes
Kingdom of Yugoslavia	Kingdom of Montenegro Kingdom of Serbia State of Slovenes, Croats and Serbs	1918	Yes (1918 - 1992)	Creation of Yugoslavia

19th Century

Proposed state	Components	Time period	Successful?	Notes
German Empire	North German Confederation Kingdom of Bavaria Kingdom of Württemberg Grand Duchy of Baden Grand Duchy of Hesse	1871	Yes (1871–1918)	Unification of Germany
Antillean Confederation	Cuba Puerto Rico Dominican Republic	1869 or 1870	No	Proposed by Ramón Emeterio Betances.
Kingdom of Greece	Kingdom of Greece United States of the Ionian Islands	1864	Yes	Treaty of London (1864)
United States	United States Republic of Texas	1845	Yes	See Texas annexation
Peru–Bolivian Confederation	Bolivia Peru	1829–1839	Yes (1836–1839)
Scandinavia	Denmark Norway Sweden	Mid-19th Century.	No
United Kingdom of Great Britain and Ireland	Kingdom of Great Britain Kingdom of Ireland	1800	Yes (1801-1922)