Timeline of world map changes

The world map has changed a lot throughout history. This page lists some of the changes.
21st Century
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.
September 17, 2022 - 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 Turkiye.
August 15, 2021 - The Taliban overthrow the Islamic Republic of Afghanistan and replace it with the Islamic Emirate of Afghanistan.
2010s
February 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 only partly recognized.
June 8, 2006 - Serbia and Montenegro splits into the Republic of Serbia and the Republic of Montenegro.
May 20, 2002 - East Timor becomes independent from Indonesia.
20th Century
1990s
December 31, 1999 - The United States gives the Panama Canal Zone to Panama.
December 20, 1999 - Macau is given from Portugal to the People's Republic of China.
July 1, 1997 - Hong Kong is given from the United Kingdom to the People's Republic of China.
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 Federal Republic of Germany and the German Democratic Republic merge. They take the name the Federal Republic of Germany.
1980s
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
July 5, 1962 - The Algerian State becomes independent of France.
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.
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 becomes independent.
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 2 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.
February 16, 1934 - The Dominion of Newfoundland joins Canada.
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.
December 6, 1922 - The Irish Free State becomes independent from the United Kingdom.
1910s
December 1, 1918 - Kingdom of Romania merges with all the principalities (Tara Romaneasca , 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 spilt 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.
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
August 5, 1908 - Bulgaria splits off from the Ottoman Empire.
October 6, 1908 - Bosnia is annexed by Austria-Hungary.
19th Century
1880's
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 Russia.
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, 1810 - France annexes (adds to its territory) Holland.
July 9, 1816 - Argentina gains independence from Spain
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.
18th Century
July 4, 1776 - The United States of America declares independence from the United Kingdom.
17th Century
1600s
1603 - Tokugawa Iesayu establishes the Tokugawa Shogunate in Japan.
1607 - The Virginia Colony is founded.
16th Century
1500s.
1502 - The Golden Horde is disestablished.
1501 - The Uzbek Khanate is disestablished.
15th Century
1450s
May 29th, 1453 - The Byzantine Empire falls to the Ottomans.
References
Geography-related lists