Christian IV's naval expedition to Stockholm

The Naval Expedition to Stockholm (Swedish: Sjötåget mot Stockholm; Danish: Kristian IV's Tog mod Stockholm) occurred from 31 August to 10 September 1612, during the late stages of the 1611–1613 Kalmar War. A Danish fleet of 36 warships under Christian IV attempted to capture Stockholm, the de facto capital of the Swedish Empire but failed. This was due to poor planning by Christian, who did not bring sufficient troops with him to seriously entertain capturing the city, as well as the Swedes' stalwart defence of Stockholm and their fortifications of the westernmost inlet leading to the city, in the form of Vaxholm Fortress.

The Kalmar War would end just over 4 months later in January 1613 with a Dano-Norwegian victory, but Christian would not gain the decisive defeat over the Swedes that he had sought at Stockholm to gain leverage over and better terms from Sweden.