Siege of Tönning
During the Great Northern War, the fortress of Tönning (Tønning) in the territory of Holstein-Gottorp, an ally of the Swedish Empire, was besieged twice. Denmark-Norway was forced to lift the first siege in 1700, but a combined force of the anti-Swedish coalition successfully besieged and took Tönning in 1713–1714.
1700[edit]
The first siege was one of the first military actions of the Great Northern War. Denmark-Norway, Saxe-Poland-Lithuania and Russia had agreed on invading the Swedish Empire on three fronts, and accordingly, Danish forces moved into Holstein-Gottorp,[1] allied and dynastically tied to Sweden,[2] and laid siege to Tönning in March 1700.[1] The siege had to be lifted when Charles XII of Sweden, backed by the Maritime Powers, in a surprise move deployed an army in front of Copenhagen, forcing Frederik IV of Denmark-Norway out of the war by the Peace of Travendal on 18 August 1700.[3] Denmark re-entered the war only in 1709 as a consequence of the Swedish defeat at Poltava.[4]