Before the devastation that was known as the Napoleonic Wars [also known as the 'Second Thirty Years War' and being seen as part of the 'Second Hundred Years' War'] , an overview of the circumstances that led to the devastation has to be recorded. After the French Revolution starting from the storming of the Bastille and continuing with social changes in France and the flight and execution of Louis XVI, most of Europe declared war on the new French Republic with initial successes until the French Republic ended the threats by 1795-1797. Afterwards, an expedition to Egypt that ended with failure at sea and land sent Napoleon Bonaparte returning to France for his 18 Brumaire Coup and the Second Coalition was defeated over 1800-1801, with a temporary peace known as Amiens from 1802-1803.
The failure of the peace would lead to the War of the Third Coalition starting from 18 May 1803 and the 19th century's greatest human tragedies. After the defeat of Cape Finisterre, Villeneuve retreated to Cadiz with his fleet. When he returned to Paris in November 1805, he tried to justify himself during a court martial that he intended to sortie after 2 months in Cadiz, but Rosily Mesros was in Cadiz and boarded his flagship less than a few hours before his intended departure and Villeneuve was quickly sent to Paris. Due to the confusion that resulted to the fleet, the French-Spanish Fleet in Cadiz would remain around there for a few years until its destruction in 1809. [P.O.D. can also be Didon, Phoenix and Dragon captured by the French on 14 August, then Napoleon defeats Austria as in reality with the failure at Cape Finisterre to defeat the British. In this case, the Combined Fleet stays at Rochefort or northern Spanish ports until its 1809 destruction. 1806 Atlantic Campaign's outcome is o.t.l..]
After the defeat of Austria, Prussia went to war with France, only to be defeated at Jena, Eylau and Friedland with the Russian Army. Had Prussia, Russia and Austria coordinated their actions in 1805 or even 1806, let alone after 18 May 1803, the outcome of the Napoleonic Wars might have been different for Europe. That, plus the lost opportunities to stop the French Republic, Napoleon or even the failure of Amiens in the blood would drastically change European history. In 1807, the presence of the French-Spanish fleet in Cadiz would lead to the British confiscation of the Portuguese Fleet.
https://www.alternatehistory.com/fo...ortuguese-fleet-instead-of-the-danish.388347/
As stated above, this is also based on the Anglo-America/Nazi War by Calbear.