There are exceptions to the rule, but they are few and far between. Napoleon won in the German principalities, Austria, the rest of Central Europe and Italy, because a significant part of the population had absorbed the ideas of the Enlightenment and felt and thought like the French soldiers: they wanted to be equal and wanted to be able to rise in the world, regardless of their low birth. This was the reason for Napoleon's early victories. But what sealed his fate in a few quick years was his fatal blunder of sending his troops into countries where people believed that the idea of equality was satanic. (Napoleon was the first "Great Satan", by the way.) He was beaten not only in Russia, which had greater manpower and resources, but also in Spain, which didn't.