Timeline of world map changes

2020s 
September 30, 2022 – Russia annexes four regions from southeast Ukraine. This action is only partly recognized, and Russia did not control all the land. This land is still recognized as part of Ukraine by most countries.
September 17, 2022 – After 3 years, The Republic of Kazakhstan officially changed the name of its capital from Nur-Sultan back to Astana.
May 31, 2022 – The Republic of Turkey officially changes its name to the Republic of Türkiye.
August 15, 2021 – The Taliban overthrow the Islamic Republic of Afghanistan and replace it with the Islamic Emirate of Afghanistan.

 2010s 
February 12, 2019 – The Former Yugoslav Republic of Macedonia officially changes its name to the Republic of North Macedonia.
April 19, 2018 – The Kingdom of Swaziland changed its name to the Kingdom of Eswatini.
February 20, 2014 – Russia annexes Crimea from Ukraine Which causes the Crimea Crisis, and The Russo-Ukrainian War begins. This action is only partly recognized.
July 9, 2011 – The Republic of South Sudan becomes independent from Sudan.

 2000s 
February 17, 2008 – The Republic of Kosovo declares independence from Serbia. Its independence is recognized by at least 110 UN-countries.
June 8, 2006 – Serbia and Montenegro splits into the Republic of Serbia and the Republic of Montenegro.
February 4, 2003 – The Federal Republic of Yugoslavia votes to enact the Constitutional Charter of Serbia and Montenegro, renaming it to Serbia and Montenegro.
May 20, 2002 – The Democratic Republic of Timor-Leste becomes independent from Indonesia.

20th Century
1990s
December 31, 1999 – The United States of America gives the Panama Canal Zone to Panama.
December 20, 1999 – Macau is given from Portugal to the People's Republic of China.
December 10, 1997 – Kazakhstan's government relocates its capital from Almaty to Astana.
July 1, 1997 – Hong Kong is given from the United Kingdom to the People's Republic of China.
May 21, 1997 – Zaire officially reverts its name back to the Democratic Republic of the Congo.
May 24, 1993 – Eritrea becomes independent.
January 1, 1993 – Czechoslovakia breaks up into The Czech Republic and Slovakia.
1991 – The Soviet Union breaks up. The countries of Russia, Ukraine, Belarus, Moldova, Latvia, Lithuania, Estonia, Kazakhstan, Uzbekistan, Turkmenistan, Tajikistan, Georgia, Azerbaijan, Armenia, and Kyrgyzstan are formed.
October 3, 1990 – The West Germany and the East Germany merge. They take the name the Federal Republic of Germany.

1980s
June 18, 1989 – A staged coup d’état changes  Socialist Republic of the Union of Burma to  Republic of the Union of Myanmar.
September 21, 1981 – Belize becomes independent from the United Kingdom.

1970s
December 1971 – Bangladesh (formerly East Pakistan) becomes independent from Pakistan after nine months of Bangladesh Liberation War.
December 1971 – The United Arab Emirates forms.

1960s
April 26, 1964 – Tanganyika and Zanzibar merges and form The United Republic of Tanzania.
December 10, 1963 – Zanzibar gains independence from Britain.
July 5, 1962 – The Algerian State becomes independent of France.
December 9, 1961 – Tanganyika gains independence from Britain.
October 1, 1960 – The Federation of Nigeria becomes its own country.
August 15, 1960 – The Republic of the Congo becomes its own country.
August 3, 1960 – The Republic of Niger becomes its own country.

1950s
January 1, 1956 – The Anglo-Egyptian Sudan becomes the Republic of the Sudan.
April 20, 1952 – Treaty of San Francisco

1940s
October 7, 1949 – East Germany is founded.
September 21, 1949 – West Germany is founded.
March 31, 1949 – The Dominion of Newfoundland joins Canada.
September 9, 1948 – The Democratic People's Republic of Korea is formed in northern Korea.
August 15, 1948 – The Republic of Korea is formed in southern Korea.
May 14, 1948 – Israel claimed its independence after The 1948 Arab-Israeli War
August 15, 1947 – The Union of India becomes independent from the United Kingdom.
August 14, 1947 – The Dominion of Pakistan becomes independent from the United Kingdom.
August 17, 1945 – The Republic of Indonesia becomes independent from the Netherlands.
September 8, 1943 – The Italian Civil War has started
April 17, 1941 – Yugoslavia Ceases to exist and is divided between Axis members.
April 10, 1941 – Independent State of Croatia, is Formed as a German Puppet State.
August 30, 1940 – Second Vienna Award, Hungary annexes Northern Transylvania from Romania.
August 6, 1940 – Estonia, is annexed by the Soviet Union.
August 5, 1940 – Latvia, is annexed by the Soviet Union
August 3, 1940 – Lithuania, is annexed by the Soviet Union
March 13, 1940 – Winter War Comes to a close, the Soviet Union annexes parts of eastern Finland

1930s
September 29, 1939 – Poland is divided along the Bug River between the German Reich and Union Of Soviet Socialist Republics (USSR)
September 27, 1939 – Poland Surrenders to the German Reich
September 1, 1939 – World War II Begins with the German Reich Invading Poland
March 22, 1939 – German Reich annexes Memel from Lithuania.
March 16, 1939 – Protectorate of Bohemia and Moravia Becomes a Partially annexed territory of the German Reich.
March 14, 1939 – Slovak State Becomes a German Puppet State.
March 1, 1939 – Poland annexes Zaolzie from Czechoslovakia.
November 2, 1938 – Hungary annexes parts of southern Slovakia.
September 30, 1938 – Munich Agreement, German Reich annexes the German speaking parts of Czechoslovakia.
March 12, 1938 – Anschluss, German Reich annexes Austria through a referendum.
May 9, 1936 – Italy annexes Ethiopia and Establishes Italian East Africa. 

1920s
The end of the Ottoman Empire:
Occupation of Constantinople after WWI (13 November 1918 – 23 September 1923).
Sultanate abolished (ended) on 1 November 1922, and the last Sultan, Mehmed VI (reigned 1918–22), left the country on 17 November 1922. 
Republic of Turkey founded on 29 October 1923. The Caliphate was abolished on 3 March 1924.Hakan Ozoglu  2011. From Caliphate to secular state: power struggle in the early Turkish Republic. ABC-CLIO, p8.  
December 6, 1921 – The Irish Free State becomes independent from the United Kingdom.

1910s
December 1, 1918 – Kingdom of Romania merges with all the principalities (Țara Românească , Moldova and Transilvania) after the Treaty of Trianon and the collapse of the Russian Empire.
November 11, 1918 – The German Empire is dissolved and the Treaty of Versailles is signed which gives land to France, Belgium, Denmark and Poland. German colonies are split between France, Belgium and the United Kingdom.
October 14, 1918 – Austria-Hungary is dissolved into Austria, Hungary, Czechoslovakia, and Yugoslavia. 
January 2, 1918 – Finland becomes independent from the Soviet Russia.
June 28, 1914 – The assassination of Archduke Franz Ferdinand of Austria and his wife Sophie causes a crisis that turned into WWI.
May 30, 1913 – Treaty of London is signed and the last of the Ottoman Empire in the Balkans is conquered by the combined forces of the Balkan League
September 29 1911 – The start of Italo-Turkish War
August 22, 1910 – Japan takes over Korea.

1900s
October 6, 1908 – Bosnia is annexed by Austria-Hungary.
August 5, 1908 –  Bulgaria splits off from the Ottoman Empire.

19th Century

 1880s 

 15 November 1884 – Berlin Conference 

1870s
January 18, 1871 – The German Empire is formed as one nation from a multitude of smaller German States.

1860s
October 18, 1867 – The United States of America buys Alaska from the Russian Empire.
March 15, 1867 – Austro-Hungarian Compromise. Austrian empire becomes Austro-Hungary.
March 17, 1861 – The Kingdom of Sardinia-Piedmont becomes the Kingdom of Italy.

1850s
1854 – United States of America buys territory from Mexico, extending the New Mexico Territory southward: Gadsden Purchase 
1840s
February 2, 1848 – After the Second MexicanAmerican War (April 25, 1846 – February 2, 1848) much of north-western Mexico becomes part of the United States.

1830s
March 2, 1836 – The Republic of Texas declares independence from Mexico.

1820s
September 7, 1822 – The Empire of Brazil declares independence from the United Kingdom of Portugal, Brazil, and the Algarves.
September 7, 1821 – The First Mexican Empire is formed.

1810s

 July 9, 1816 – Argentina gains independence from Spain
 July 9, 1810 – France annexes (adds to its territory) Holland.

1800s
August 6, 1806 – The Holy Roman Empire is dissolved.
January 1, 1804 – Haiti becomes independent from France.
1803 – The United States buys the Louisiana Territory from France.
1802 – The Nguyễn dynasty is found.

18th Century

July 4, 1776 – The United States of America declares independence from the United Kingdom.

17th Century

 1600-1699 

 1607 – The Colony of Virginia is founded.
 1603 – Tokugawa Iesayu establishes the Tokugawa Shogunate in Japan.

 16th Century 

 1500-1599 

 1527 – Fall of the Majapahit
 1507 – The Kingdom of Portugal conquers Muscat.
 1502 – The Golden Horde is disestablished.
 1501 – The Uzbek Khanate is disestablished.

 15th Century 

 1499 – The Safavid Empire starts conquering Persia.
 1492 – The Spanish colonization of the Americas.
 May 29th, 1453 – The Byzantine Empire falls to the Ottomans.

References

Category:Geography-related lists