The Swedish-Danish Wars were a series of conflicts between the kingdoms of Sweden and Denmark from the late 16th to the early 18th centuries. These wars primarily revolved around control of the Baltic Sea and trade routes, as both nations sought to expand their influence in Northern Europe. Key conflicts included the Kalmar War (1611-1613) and the Great Northern War (1700-1721). The wars often involved alliances with other countries, such as Norway and Poland, and were marked by significant battles and shifting territorial control. Ultimately, these conflicts contributed to the decline of Danish power and the rise of Sweden as a dominant force in the region.