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Second Anglo‑Danish War (1807)

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Second Anglo‑Danish War (1807)
ConflictSecond Anglo‑Danish War (1807)
PartofNapoleonic Wars
DateAugust–September 1807
PlaceCopenhagen, Denmark–Norway, North Sea, Baltic Sea
ResultBritish capture of the Danish fleet; Treaty of Kiel precursor effects
Combatant1United Kingdom
Combatant2Denmark–Norway
Commander1Arthur Wellesley? James Gambier; Charles James Napier; Earl of Mulgrave
Commander2= Christian VII of Denmark? Prince Frederick of Hesse; Heinrich Ernst Schimmelmann?
Strength1British expeditionary force, Royal Navy, Royal Artillery
Strength2Danish militia, Royal Danish Navy, Copenhagen garrison

Second Anglo‑Danish War (1807) The Second Anglo‑Danish War (1807) was a brief but consequential conflict during the Napoleonic Wars in which the Royal Navy and British expeditionary forces attacked Copenhagen to seize or destroy the Royal Danish Navy to prevent its use by Napoleon and the First French Empire. The operation combined naval blockade, amphibious landings, siege warfare, and the bombardment of Copenhagen, culminating in surrender and seizure of Danish warships and naval stores. The campaign had significant repercussions for Denmark–Norway, Anglo‑French relations, and Northern European naval strategy.

Background

In the aftermath of the Battle of Trafalgar and the intensifying Continental System, British strategic planners feared that the fleet of Denmark–Norway might fall under the influence of Napoleon or be requisitioned by the French Navy. Britain’s concern intersected with diplomatic tensions involving the Treaty of Tilsit, Russian alignment with France, and British reliance on the Baltic Sea for naval stores such as timber and tar from Norway and Sweden. The global contest for maritime supremacy that included the Anglo‑French naval rivalry and prior incidents such as the Battle of Copenhagen (1801) shaped British willingness to use preemptive force.

Prelude and diplomatic crisis

A series of diplomatic exchanges involved envoys such as Lord Castlereagh, Earl of Mulgrave, and Danish ministers including Christian Günther von Bernstorff. Intelligence from British agents and intercepted correspondence, linked to operations by the Navigation Acts era intelligence apparatus and merchants in Saint Petersburg and Copenhagen, convinced Grenville‑era policymakers that Denmark might accept coercion by France. Britain issued ultimatums and demanded the surrender of the Danish fleet; Danish authorities, invoking neutrality and monarchic prerogative associated with Christian VII of Denmark and Crown Prince regency politics, refused. Negotiations faltered amid reports of French envoys and Russian naval movements, heightening fears that the fleet would be sailed to Brest or Kronstadt.

British expedition and bombardment of Copenhagen

In August 1807 the Royal Navy under admirals including James Gambier and expedition commanders such as Lord Cathcart assembled an armada of warships, troop transports, and artillery vessels off Copenhagen. British forces landed on Zealand and established siege works to invest the city, drawing on officers experienced from campaigns like the Walcheren Campaign. When negotiations failed, commanders authorized a bombardment that employed Congreve rockets as well as conventional naval shells. The bombardment of Copenhagen devastated urban districts, igniting fires that consumed parts of the city and damaged infrastructure associated with the Christiansborg Palace and mercantile quarters tied to the Danish Asiatic Company.

Military operations and naval actions

Operations combined amphibious assaults, siege artillery deployment, and close blockade actions by squadrons drawn from the Channel Fleet and North Sea Fleet. British troops attacked Danish outworks and fortifications on the approaches to Copenhagen, clashed with militia and regulars of the Royal Danish Army, and secured shipyards and anchorages at Holmen and Nyholm. Royal Navy boarding parties and prize crews seized ships in harbor, including ships of the line, frigates, corvettes, and transports, while British frigates and sloops intercepted Danish privateers and convoy movements in the Baltic Sea and off Jutland. The capture of naval stores, shipwright facilities, and the dismantling of defenses followed formal capitulation terms negotiated with Danish commanders and civil authorities.

Aftermath and political consequences

The British seizure of the Danish fleet provoked outrage across Europe and was denounced in diplomatic correspondence by representatives of Russia, France, and neutral powers such as Prussia. The operation precipitated a shift in Danish alignment, contributing to eventual Danish cooperation with French policies and later involvement in the Gunboat War (1807–1814) against British maritime supremacy. The removal of Danish naval capability altered the balance of naval power in the North Sea and the Baltic, affecting British supply lines for naval stores and provoking debate in the Parliament of the United Kingdom and among figures such as Pitt’s successors about the legality and morality of preemptive strikes. The episode influenced later treaties, including diplomatic threads leading toward the Treaty of Kiel.

Casualties, damage, and cultural impact

Civilian casualties and destruction from the bombardment were substantial; fires and explosions destroyed warehouses, churches, and residential quarters, leaving many homeless and disrupting trade with ports like Hamburg and Gdańsk. Military casualties affected both British expeditionary troops and Danish defenders, with loss of life, wounded, and prisoners of war. The cultural aftermath included accounts by observers such as diarists and chroniclers tied to Copenhagen University and artists from the Danish Golden Age, whose works reflected trauma and national loss. The campaign entered political memory across Britain and Denmark–Norway as a contentious example of coercive diplomacy and naval preemption during the age of Napoleon.

Category:Wars involving the United Kingdom Category:Wars involving Denmark Category:1807 in Denmark Category:Napoleonic Wars