| Country |
Birth of current form of government |
Date of acquisition of sovereignty |
Date of most recent significant territorial modification |
| Date[1] |
Event |
Date[1] |
Event |
Date[1] |
Event |
|
|
|
1912-11-28 |
Declaration of independence from Ottoman Empire |
|
|
| 1913-07-29 |
Recognition of independence in Treaty of London |
|
|
|
1813 |
Reversal of annexation of Andorra and Catalonia by the Napoleonic Empire, through the Peninsular war |
|
|
|
1955-05-15 |
Austrian Independence Treaty re-established Austria as a sovereign state |
1921-12-14 |
City of Sopron moved to Hungary after plebiscite |
|
|
|
1990-07-27 |
Declaration of State Sovereignty of the Belarusian Soviet Socialist Republic |
1945 |
Curzon Line |
| 1991-08-25 |
Independence recognized by Soviet Union |
|
1831-07-21 |
King Leopold I of Belgium swears allegiance to the constitution making the country a constitutional monarchy |
1830-10-04 |
Independence is proclaimed by the provisonial government |
1919-06-28 |
Treaty of Versailles and annexation of the East Cantons |
|
|
|
1992-03-05 |
Independence declared |
1943-11-25 |
Establishment of Bosnia in Socialist Federal Republic of Yugoslavia |
|
|
|
1908-08-05 |
Bulgaria declares independence from the Ottoman Empire. |
1940-09-07 |
Under the Vienna Awards, Southern Dobruja is returned to Bulgaria. |
|
1991-06-25 |
Declared independence from Yugoslavia |
|
1960-08-16 |
Independence from United Kingdom |
|
1993-01-01 |
Dissolution of Czechoslovakia, creating Czech Republic and Slovakia |
|
1849-06-05 |
King Frederik VII signs the first free constitution, making Denmark a constitutional monarchy. |
1945-05-04 |
German occupying forces surrender. |
1920-06-15 |
Sønderjylland was recovered from Germany |
|
|
|
1918-02-24 |
Independence declared from the Russian Empire. |
1945 |
Eastern coast of Narva river and Petseri County are transferred to Russian SFSR. |
| 1991-08-20 |
Independence re-declared from the Soviet Union. |
|
|
|
1917-12-06 |
Independence from Russian Empire declared |
1956 |
Porkkala returned from Soviet control. |
| 1918-01-03 |
Independence from Russia recognized by the highest Soviet executive body - VTsIK. |
France |
1870-09-04 |
Establishment of a lasting republican form of government, considered uninterrupted in French law |
1944-08-09 |
Ordinance issued by the Provisional Government of the French Republic reinstating Republican legality and nullifying all Vichy legislation |
1947-02-10 |
Metropolitan France: Annexation of Tende, La Brigue and other villages formerly in Italy |
| 1958-10-05 |
Establishment of the current semi-presidential system known as the Fifth Republic |
1962-07-05 |
Overseas France: Loss of the French departments in Algeria following the latter's independence |
|
|
|
1955-05-05 |
Federal Republic of Germany (commonly referred to at the time as West Germany) declared fully sovereign |
1990-10-03 |
Reunification of West Germany and East Germany |
|
|
|
1944-10-13 |
End of Axis occupation of Greece during World War II |
1947-02-10 |
Peace treaty with Italy awards the Dodecanese to Greece |
|
1989-10-23 |
Proclamation of the Republic of Hungary |
1947-02-10 |
The Treaty of Peace with Hungary returns Hungary to 1920 borders, with small changes |
|
930 |
The Icelandic Commonwealth established. |
1944-06-17 |
Secedes from a Union with Denmark formally as an independent republic. |
1972-09-01 |
No territorial changes on land have taken place, however the expansion of the Exclusive Economic Zone was such an important change in territory for Iceland that in merits a special inclusion here. |
| 1946 |
Departure of last US occupation troops |
|
|
|
1922-12-06 |
Irish Free State recognized as independent from the United Kingdom. |
1920-12-23 |
Division into Northern Ireland and Southern Ireland by the Government of Ireland Act 1920. |
Italy |
1946-06-02 |
Birth of the Italian Republic |
1945-04-25 |
Disestablishment of the German-backed Italian Social Republic, whereby the unity and independence of the Italian state is restored |
1954-10-26 |
Official annexation of the city of Trieste to Italy |
| 1975-11-10 |
Signing of the Treaty of Osimo which definitely divides the Free Territory of Trieste between Italy and Yugoslavia |
| [4] |
|
|
2008-02-17 |
Republic of Kosovo established, unilateral declaration of independence from Serbia. |
1945 |
Autonomous Kosovo-Metohian Area established within the Socialist Federal Republic of Yugoslavia |
|
|
|
1918-02-16 |
Independence declared from Germany and Russia |
1939-10-27 and 1940-08-03 |
Eastern Vilnius Region ceded to Lithuania |
| 1990-03-11 |
Act of the Re-Establishment of the State of Lithuania declaring independence from the Soviet Union |
|
|
|
1918-11-18 |
Independence declared from Germany and Russia |
1944 |
Abrene district ceded to Russian SFSR (modern Russia) |
| 1990-05-04 |
Independence declared from Soviet Union |
|
|
|
1813-10-19 |
Dissolution of the Confederation of the Rhine |
1719-01-23 |
Purchase of Vaduz |
|
|
|
1945 |
End of German occupation during World War II |
1839-04-19 |
Partition of Luxembourg under the Treaty of London |
|
1991-09-08 |
After a referendum, the Socialist Republic of Macedonia declared independence from Yugoslavia |
|
|
|
1964-09-21 |
Independence from United Kingdom |
|
|
|
1991-08-27 |
Independence from Soviet Union |
1940-08-02 |
Moldavian SSR formed |
|
|
|
1861 |
Franco-Monegasque Treaty confirms Monaco's sovereignty (formerly a protectorate of the Kingdom of Sardinia) |
|
|
|
2006-06-03 |
Declaration of independence from Serbia and Montenegro |
|
|
1945-05-05 |
German occupying forces surrender. |
1839-04-19 |
The United Kingdom of the Netherlands divided under the Treaty of London (1839). |
|
1963 |
De Facto independence from Republic of Cyprus |
|
|
|
1945-05-08 |
German occupying forces surrender. |
1930-02-27 |
Jan Mayen was made part of the Kingdom of Norway. |
|
1989-06-04 |
The first partially free Parliament's vote after 45-years long Soviet domination |
1918-11-11 |
Józef Pi?sudski was appointed Commandier in Chief of Polish Army, the day is celebrated as Independence Day. |
1951-02-15 |
Polish-Soviet border adjustment treaty |
|
1974-04-25 |
Carnation Revolution ends the authoritarian Estado Novo |
1139-07-26 |
County of Portugal becomes independent from the Kingdom of León after the Battle of Ourique as part of the Reconquista. Recognized by León in 1143 and by the Pope in 1179. |
1801-06-06 |
Spain occupies the present day border town of Olivença since the War of the Oranges. |
|
|
|
1877-05-21 |
Independence declared from the Ottoman Empire |
|
|
| 1878-07-13 |
Independence recognized internationally by the Treaty of Berlin |
|
1243 |
Formation of republican government |
0301-09-03 |
Traditional founding |
1463 |
Added Fiorentino, Montegiardino, Serravalle, and Faetano |
|
2006-06-05 |
Republic of Serbia declared legal successor to Serbia and Montenegro, ending the process of the dissolution of Yugoslavia |
1945-03-08 |
Government of Democratic Federal Yugoslavia formed after end of German occupation during World War II |
1804 |
Karadjordje First Serbian Uprisal |
| 2008-02-17 |
Republic of Kosovo declares independence from Serbia.[4] |
|
1993-01-01 |
Dissolution of Czechoslovakia, creating Slovakia and Czech Republic |
|
1991-06-25 |
Declaration of independence from Yugoslavia |
|
|
January 21, 1479 |
Dynastic union of Castile and Aragon into the Catholic Monarchy under Ferdinand and Isabella.[5] |
1801-06-06 |
Spain occupies the present day border town of Olivença since the War of the Oranges. |
|
|
|
1523-06-06 |
Gustav Vasa elected King of Sweden and marking a definite secession from the Kalmar Union. |
1809-03-29 |
Loss of Finland to Imperial Russia. |
|
1291-08-01 |
Establishment of the Swiss Confederacy. |
1815-08-07 |
Restauration of the Ancien Régime (federalism), reverting the changes imposed by Napoleon Bonaparte. |
|
|
|
1991-08-24 |
Independence from Soviet Union declared |
1954-02-19 |
Transfer of Crimea from Russia to Ukraine |
United Kingdom |
|
|
|
|
1922-12-06 |
Loss of Southern Ireland following the creation of the Irish Free State agreed upon in the Anglo-Irish Treaty [6] |
|
1274 |
Birth of current form of government the Papal conclave in 1274 |
1929-06-07 |
Ratification of the Lateran Treaty, making the Vatican City a sovereign State |
1929-02-11 |
Signing of the Lateran Treaty |