Trianon and Fontainebleau Decrees (1810)

The Trianon Decree of 5 August 1810 and the Fontainebleau Decree of 18 October 1810 tightened Napoleon's Continental System through different mechanisms. Trianon imposed heavy customs duties on colonial goods. Fontainebleau directed the seizure and destruction of British manufactured goods. They were wartime imperial measures, not a single instrument and not a complete statement of Continental System law.

The Trianon tariff covered goods such as sugar, coffee, cotton and dyestuffs. Colonial imports commonly reached continental markets through British shipping, British finance or smuggling networks. The decree therefore raised revenue from commerce that prohibition had not eliminated. Rates differed by commodity, so describing the instrument as a uniform 50 per cent tariff is inaccurate.

The Fontainebleau measures treated British manufactures differently. They subjected covered goods to confiscation and public burning, while associated measures strengthened exceptional customs enforcement. Enforcement varied across the Empire and dependent states. A decree issued in Paris did not produce uniform administrative capacity throughout Europe.

Together the measures reveal a recurring problem in economic warfare. A government may seek absolute denial while relying on licences, customs revenue and selective exceptions to manage scarcity. These arrangements can preserve state revenue and channel trade, but they also create rents, corruption and political friction among allies and dependent territories.

Historians disagree over the Continental System's economic effect. François Crouzet identifies real disruption to British and continental trade, while Eli Heckscher emphasises contradictions and leakage within the system. The decrees support neither a claim that blockade was economically irrelevant nor a claim that they alone caused the System's collapse. War, British countermeasures, smuggling, harvest conditions and political resistance interacted with them.

See also

Napoleon's Continental System (1806-1814) · Berlin Decree (1806) · Milan Decree (1807) · Rambouillet Decree (1810) · blockade

Sources

1. Eli F. Heckscher, *The Continental System: An Economic Interpretation* (Clarendon Press, 1922).
2. François Crouzet, "Wars, Blockade, and Economic Change in Europe, 1792-1815", *The Journal of Economic History*, volume 24, issue 4 (1964), pp. 567-588.
3. Katherine B. Aaslestad, "Blockade and Economic Warfare", in *The Cambridge History of the Napoleonic Wars*, volume 3 (Cambridge University Press, 2022).
4. Fondation Napoleon, "Politique douaniere francaise, blocus et Systeme continental en Allemagne".