Valdemar II of Denmark

Valdemar II Valdemarsen (28 June 1170 – 28 March 1241), later remembered as Valdemar the Victorious (Danish: Valdemar Sejr) and Valdemar the Conqueror, was King of Denmark from 1202 until his death in 1241.

In 1207, Valdemar invaded and conquered Lybeck and Holstein, expanding the Danish territories. His involvement in the Norwegian succession led to the second Bagler War, temporarily settling the issue and making the Norwegian king owe allegiance to Denmark. He faced disputes with the papacy over the appointment of the Prince-Archbishop of Bremen and the Bishop of Schleswig. Valdemar's military campaigns included conflicts in northern Germany and the establishment of Danish rule in Estonia in 1219. His reign saw the adoption of a feudal system in Denmark and the creation of the Code of Jutland, which served as Denmark's legal code until 1683.

He was the second son of King Valdemar I of Denmark and Sophia of Polotsk. When his father died, young Valdemar was only twelve years old. He was named duke of Southern Jutland (Latin: dux slesvicensis.) His regent was Bishop Valdemar Knudsen, the illegitimate son of King Canute V of Denmark. Bishop Valdemar was an ambitious man and disguised his own ambitions as young Valdemar's. When Bishop Valdemar was named archbishop of Bremen in 1192, his plot to overthrow King Canute VI of Denmark (elder brother of Duke Valdemar) with the help of the German nobility and place himself on Denmark's throne, was revealed.

Duke Valdemar realized the threat Bishop Valdemar represented. He thus invited him to Aabenraa in 1192. The bishop then fled to Norway to avoid arrest. The following year, Bishop Valdemar organised – supported by the Hohenstaufens – a fleet of 35 ships and harried the coasts of Denmark, claiming the Danish throne for himself based on the fact that he was the son of King Canute V. In 1193, King Canute VI captured him. Bishop Valdemar stayed in captivity in Nordborg (1193–1198) and then in the tower at Søborg Castle on Zealand until 1206. He was later released upon the initiative of Dagmar of Bohemia (the wife of Duke Valdemar) and Pope Innocent III, after swearing to never interfere again in Danish affairs.

Young Valdemar faced another threat from Count Adolf III of Holstein. Adolf tried to stir up other German counts to take southern Jutland from Denmark, and to assist Bishop Valdemar's plot to take the Danish throne. With the bishop again in prison, Duke Valdemar went after Count Adolph, and with his own troop levies, he marched south and captured Adolph's new fortress at Rendsburg. He defeated and captured the count at the Battle of Stellau in 1201, and imprisoned him in a cell next to Bishop Valdemar. Two years later, due to an illness, Count Adolph was able to buy his way out of prison by ceding all of Schleswig, north of the Elbe, to Duke Valdemar. In November 1202, Duke Valdemar's elder brother, King Canute VI, unexpectedly died childless.

Duke Valdemar was subsequently proclaimed king at the Jutland Assembly (landsting). The nearby Holy Roman Empire was torn by civil war due to having two rivals contesting for its throne, Otto IV, House of Guelf, and King Philip, House of Hohenstaufen. Valdemar II allied himself with Otto IV against Phillip.

In 1203 Valdemar invaded and conquered Lybeck and Holstein, adding them to the territories controlled by Denmark. In 1204 he attempted to influence the outcome of the Norwegian succession by leading a Danish fleet and army to Viken in Norway in support of Erling Steinvegg, the pretender to the Norwegian throne. This resulted in the second Bagler War which lasted until 1208. The question of the Norwegian succession was temporarily settled and the Norwegian king owed allegiance to the king of Denmark.

In 1207, a majority of Bremian capitulars again elected Bishop Valdemar as prince-archbishop, while a minority, led by the capitular provost Burkhard, Count of Stumpenhausen fled for Hamburg, being the seat of a Bremian subchapter with regional competence and delegating for episcopal elections two participants to the main Bremian chapter. The German King Philip recognised Valdemar as the legitimate prince-archbishop of Bremen, because thus the prince-archbishopric would become his ally against Valdemar II.