871    Battle of Reading: Ethelred of Wessex fights, and is defeated by, a Danish invasion army.

910    The last major Danish army to raid England is defeated at the Battle of Tettenhall by the allied forces of Mercia and Wessex, led by King Edward the Elder and Earl Aethelred of Mercia.

1157    The Battle of Grathe Heath ends the civil war in Denmark. King Sweyn III is killed and Valdemar I restores the country.

1340    Niels Ebbesen kills Gerhard III of Holstein in his bedroom, ending the 1332-1340 interregnum in Denmark.

1448    Christian I is crowned king of Denmark.

1520    King Christian II of Denmark and Norway defeats the Swedes at Lake Åsunden.

1520    Stockholm Bloodbath begins: A successful invasion of Sweden by Danish forces results in the execution of around 100 people.

1523    Christian II is forced to abdicate as King of Denmark and Norway.

1676    Battle of Lund: A Danish army under the command of King Christian V of Denmark engages the Swedish army commanded by Field Marshal Simon Grundel-Helmfelt.

1794    Denmark and Sweden form a neutrality compact.

1807    The Royal Navy bombards Copenhagen with fire bombs and phosphorus rockets to prevent Denmark from surrendering its fleet to Napoleon.

1814    The Constitution of Norway is signed and the Danish Crown Prince Christian Frederik is elected King of Norway by the Norwegian Constituent Assembly.

1843    Tivoli Gardens, one of the oldest still intact amusement parks in the world, opens in Copenhagen, Denmark.

1844    Independence of the Duke of Schleswig-Holstein from Denmark.

1849    Denmark becomes a constitutional monarchy by the signing of a new constitution.

1863    Danish Prince Wilhelm arrives in Athens to assume his throne as George I, King of the Hellenes.

1863    King Christian IX of Denmark decides to sign the November constitution that declares Schleswig to be part of Denmark. This is seen by the German Confederation as a violation of the London Protocol and leads to the German–Danish war of 1864.

1864    Battle of Dybbøl: A Prussian-Austrian army defeats Denmark and gains control of Schleswig. Denmark surrenders the province in the following peace settlement.

1864    Second war of Schleswig ends. Denmark renounces all claim to Schleswig, Holstein and Lauenburg, which come under Prussian and Austrian administration.

1905    Prince Carl of Denmark becomes King Haakon VII of Norway.

1911    International Women's Day is launched in Copenhagen, Denmark, by Clara Zetkin, leader of the Women's Office for the Social Democratic Party in Germany.

1915    Denmark amends its constitution to allow women's suffrage.

1917    The United States pays Denmark $25 million for the Virgin Islands.

1917    The United States takes possession of the Danish West Indies after paying $25 million to Denmark, and renames the territory the United States Virgin Islands.

1920    A new border treaty between Germany and Denmark gives northern Schleswig to Denmark.

1940    Denmark leaves the League of Nations.

1943    World War II: in Denmark, a general strike against the Nazi occupation is started.

1943    German-occupied Denmark scuttles most of its navy; Germany dissolves the Danish government.

1943    World War II: Adolf Hitler orders the deportation of Danish Jews.

1944    Iceland declares independence from Denmark and becomes a republic.

1945    World War II: Canadian and UK troops liberate the Netherlands and Denmark from Nazi occupation when Wehrmacht troops capitulate

1946    Soviet troops leave the island of Bornholm, Denmark after an 11 month occupation.

1963    The Soviet nuclear powered submarine K-33 collides with the Finnish merchant vessel M/S ''Finnclipper'' in the Danish straits.

1964    In Copenhagen, Denmark, Gigliola Cinquetti wins the ninth Eurovision Song Contest for Italy singing "Non ho l'età" ("I'm not old enough").

1972    Queen Margrethe II of Denmark ascends the throne, the first Queen of Denmark since 1412 and the first Danish monarch not named Frederick or Christian since 1513.

1972    Queen Margrethe II of Denmark ascends the throne, the first Queen of Denmark since 1412 and the first Danish monarch not named Frederick or Christian since 1513.

1973    Denmark, the United Kingdom of Great Britain and Northern Ireland, and the Republic of Ireland are admitted into the European Community.

1989    Denmark introduces the world's first legal modern same-sex civil union called "registered partnership".

1993    EU - riots in Nørrebro, Copenhagen caused by the approval of the four Danish exceptions in the Maastricht Treaty referendum. Police opened fire against civilians for the first time since World War II and injured 11 demonstrators. In total 113 bullets are fired.

1999    The Euro currency is introduced in 11 countries - members of NATO (with the exception of the United Kingdom, Denmark, Greece and Sweden).

2000    The Oresund Bridge, connecting Sweden and Denmark, opens for traffic.

2005    The controversial drawings of Muhammad are printed in the Danish newspaper Jyllands-Posten.

2007    "Squatters" are evicted from Ungdomshuset in Copenhagen, Denmark, provoking the March 2007 Denmark Riots.