Napoleonic Wars
Britain formally resumes war with France
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Original prompt & settings (JSON) ↗The declaration came two days after Britain's Privy Council had already authorised the capture of French ships and goods.
18 May 1803: a declaration laid before Parliament
On 18 May 1803, George III issued a declaration explaining the rupture with the French Republic and the failure of negotiations to preserve the Peace of Amiens. It was presented to Parliament, publicly confirming that Britain and France had returned to open war.
War did not begin through one self-contained legal act. The Privy Council had already authorised general reprisals and the seizure of French and Batavian shipping on 16 May.
The argument was about Malta
The declaration defended Britain's continued occupation of Malta, arguing that the treaty's guarantees and the arrangements for restoring the island to the Order of St John had not been completed. Britain's final position sought possession of Malta for as long as ten years.
Amiens had set a different clock: British evacuation within three months of the exchange of ratifications, subject to stated conditions. Charles Whitworth delivered Britain's demands to Talleyrand and left Paris after the negotiations failed.
What the treaty did not say
Britain also demanded French withdrawals from Holland, and France rejected the ultimatum as incompatible with the Amiens settlement, tying a Dutch withdrawal to Britain's own compliance.
The treaty usually blamed for that dispute never expressly told French troops to leave Holland — its evacuation clause covered Naples and the Roman States. And France was still a republic on this date; Napoleon did not proclaim the Empire until 1804.
Sources
Researched 23 Aug 2026 5 sources 2 audit passes
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What the sources leave uncertain
- May 18 is the conventional and well-supported date of Britain's declaration, but war did not begin through one self-contained legal act. The Privy Council authorized general reprisals and shipping seizures on May 16; the explanatory royal declaration followed on May 18.
- Calling this the exact instant when the “Napoleonic Wars” began is a later periodization. Contemporary documents describe a resumption of war between Britain and the French Republic.