During World Wars I and II, many countries managed to stay neutral, like Spain and Switzerland. Was there any major country (e.g. not a city-state or a micronation) that did the same during the Napoleonic Wars?
I just performed some Google search that gave me the map of Europe during Napoleonic wars.
Here goes the reproduction from Wikipedia:
See the image in other resolutions here: Europe 1812 map en.png
So, in Europe, in 1812, there were the following countries:
- Great Britain - fought
- Portugal - fought
- Spain - fought
- Papal States - fought
- Kingdom of Naples - fought
- German States - if treated as a whole (Confederation of the Rhine), fought
- Austria - fought
- Denmark + Norway - fought
- Switzerland - fought
- Prussia - fought
- Sweden - fought
- Duchy of Warsaw - fought
- Ottoman Empire - fought
- Russia - fought
- Holland - fought
I think doing just simple googling would help.
Please remember that Napoleonic Wars was not one war and countries (except Great Britain) did not fight in each of them.
No major European country stayed neutral (for the whole time of Napoleonic wars).
The Ottoman Empire (partly placed in Europe, although not traditionally considered a European country) possibly comes closest. But it was by no means the boring Swiss-style neutrality, so I would review the Napoleon's Egyptian campaign, the Russo-Ottoman War of 1806-1812, and the 1807 British naval intervention to get the full story.
Source: http://books.google.com/books?id=cG6JC_E1Rf8C&pg=PA269 combined with http://books.google.pl/books?id=h_TguykH1qcC&pg=PA8 to rule out Kingdom of Sardinia; combined with http://books.google.pl/books?id=QjzYdCxumFcC&pg=PA223 for Ottoman Empire.
Update: Ottoman Empire was in a war with France until 1802.