1434 A Swedish peasant rebellion breaks out against the Danes
1448 Disagreements over who should be the new King after Christoffer the Third's death, leads to war between Denmark and Sweden
1455 After 7 years of war Danish King Christian the First is recognised as King over the Union
1463 Another outbreak of rebellion against the Danes in Sweden
1471 In the Battle of Brunkeberg, the Danes suffer complete defeat at the hands of the Swedish
1472 Peace is concluded
1497, 29 September King Hans attempts to grab power in Sweden after internal disturbances. His army of Germanmercenaries defeats a Swedish army in the battle of Rotebro and he is recognised as King of Sweden
1500, 17 February King Hans is defeated in the battle of Dittmarsken
1501 A Swedish rebellion breaks out and King Hans loses most of Sweden
1501 The Swedes attack Norway but are forced back. Stockholm surrenders to the Swedes
1510 Lübeck declares war on Denmark and Sweden joins Lübeck
1511, 9 August A Danish fleet forces the Lübeck fleet to fall back at Bornholm, and the rest of the war they remain in port
1512, April Denmark concludes peace with Sweden and Lübeck
1517 A rebellion in Sweden flares up again. In August a Danish army is deployed at Stockholm, but is defeated at Vedla
1518 Another Danish army is deployed at Stockholm, but is not capable of forcing a decisive battle
1520, 6 April A Danish army defeats a Swedish peasant army at Uppsala and occupies Stockholm
1520, 8 November The Swedish army is defeated. King Christian the Second acquires the title of King of Sweden, and orders all the Swedish nobility executed. This day is known as the bloodbath in Stockholm
1521 Swedish Gustav Vasa reconquors all of Sweden and the Union is dissolved Gustav is declared King of Sweden
1534 A Civil War named the Count's Feud breaks out. Captain Clement raises a Juttish peasant army
1535, 9 June A Danish and Swedish fleet fights a naval battle against Lübeck. The battle ends in a draw but in the coming days the Lübeck fleet is destroyed
1536, 11 June In the Danish Civil War a Danish peasant army is massacred in the battle of Oxnebjerg
1537, 16 January Lübeck concludes peace with Christian the Third. The Civil War ends when Copenhagen surrenders to Christian the Third
War against The Netherlands 1542 – 1543
1542 War breaks out between France and the German Emperor. Emperor Charles V supports Frederick II, Elector Palatine for the Danish crown, and Denmark participates in the war on the side of France
1543 Denmark declares war on Netherlands, that are under the rule of Charles
1544 Denmark concludes the Treaty of Speyer with the German Emperor
1563, 31 July Ambition and a fight over the right to each others national weapons, war breaks out between Denmark and Sweden
1563, 15 September A Danish army moves into Sweden and occupies Älvsborg
1564, 30 May A Danish fleet under the command of Herluf Trolle, defeats a Swedish fleet between Öland and Gotland
1565, 9 October The war's only big battle stands at Axtorna. Rantzau defeats a numerically superior Swedish army
1570, 13 December A peace treaty (Treaty of Stettin) is concluded and terminates the war between Denmark and Sweden. Denmark gives back Älvsborg in return for 150.000 daler (Danish coin)
1643, December: War with Sweden breaks out because of a long dispute over the dominance of the Øresund, and dissent over the Øresund toll.
1643, 12 December: The Swedish Field Marshal Thorsteinson crosses the border to Holstein from Swedish territory in North Germany.
1644, January: Jutland is occupied by Swedish troops.
1644, February: Swedish troops under Gustav Horn advance into Skåne and are stopped at Malmö.
1644, 16 May: A Danish fleet defeats a Dutch fleet at Lister Dyb, which was sent to reinforce the Swedes.
1644, 1 July: The Danish Fleet meets the Swedish Fleet at Koldberg Heide. The battle ends in a decisive Danish victory, and the Swedish withdraw to the Kiel Bay.
1644, 12 October: A combined Swedish and Dutch fleet defeats a Danish fleet at Fehmarn. This effectively decides the outcome of the war.
1645, February: Peace negotiations are started in Brømsebro.
1645, 13 August: Denmark and Sweden conclude peace in Brømsebro. Denmark is forced to hand over Gotland, Øsel and Halland (South Sweden) as well as the Norwegian province Jemtland.