Editing Frederick III of Denmark (section)

=== Assault on Copenhagen repelled ===
{{Main|Dano-Swedish War (1658–1660)|Assault on Copenhagen (1659)}}
[[File:Stormen på København (F.C. Lund).jpg|thumb|Frederick III on his white stallion at the [[Assault on Copenhagen (1659)|Assault on Copenhagen]]. Painted by [[Frederik Christian Lund]], 1887.]]
Charles's suspicion of [[Denmark-Norway]] led him to a further assault on his neighbor. Terror was the first feeling produced at [[Copenhagen]] by the landing of the main [[Swedish army]] at [[Korsør]] on [[Zealand (Denmark)|Zealand]] on 17 July 1658. None had anticipated the possibility of such a sudden and brutal attack, and everyone knew that the Danish capital was very inadequately fortified and garrisoned.<ref name="Britannica" />

During this war, Frederick attained great popularity in the general public, as he rebuked the advice of his counsellors to flee Copenhagen with the memorable words "I will die in my nest" and actively led the defense of the city.<ref name="gyldendal" /> On 8 August, representatives from all Estates in the capital urged the necessity of a vigorous resistance, and the citizens of Copenhagen, headed by the mayor [[Hans Nansen]], protested their unshakable loyalty to the king and their determination to defend Copenhagen to the uttermost. The Danes had only three weeks of warning of the approaching danger, and the vast and dilapidated line of defense had at first only 2,000 regular defenders. But the government and the people displayed a memorable and exemplary energy under the constant supervision of the king and queen and mayor Nansen. By the beginning of September, all the breaches were repaired, the walls bristled with cannons, and 7,000 men were under arms.<ref name="Britannica" />
[[File:Heimbach-König Frederik III. von Dänemark kniend vor der Schlacht von Nyborg-WUS03245.jpg|thumb|180px|Frederik III during the [[battle of Nyborg]]. Painted by Wolfgang Heimbach, 1659. However, Frederik III did not himself attend the battle, making this an effective piece of [[propaganda]]]]
So strong was the city by this time that Charles X, abandoning his original intention of carrying the place by assault, began a regular siege. This he also was forced to abandon when an auxiliary [[Netherlands|Dutch]] fleet reinforced and reprovisioned the garrison and defeated him on 29 October in the [[Battle of the Sound]]. The Dutch then assisted in the liberation of the Danish Isles in 1659. Thus, the Danish capital had saved the Danish monarchy.<ref name="Britannica" /> The war was ended by the [[Treaty of Copenhagen (1660)|Treaty of Copenhagen]] in May 1660, which confirmed the cession of [[Scania]], [[Halland]], and [[Blekinge]] from the Treaty of Roskilde, while [[Bornholm]] and parts of [[Schleswig]] reverted to Denmark.<ref name="gyldendal" />