King Valdemar II, also known as Valdemar the Victorious, was a Danish monarch who reigned from 1202 to 1241. He is best known for his military campaigns that expanded the territory of Denmark, particularly in the Baltic region. Valdemar II played a significant role in the establishment of Danish influence over Estonia and Finland. During his reign, Valdemar II faced various challenges, including conflicts with the Holy Roman Empire and internal strife within Denmark. His efforts to consolidate power and strengthen the monarchy were met with mixed results, leading to a turbulent period in Danish history. Valdemar II's legacy is marked by both his military successes and the eventual decline of his reign.