[nickik]

This is simply wrong. Conquering parts of the flat lands could have been pretty easy but the Swiss strategy was retreat into the mountain area.

And if you have ever looked at the modern american army in afganistan then you will know that you can't just show up with some people and resources and take everything over.

Effective defense is about causing more pain then it is worth conquering you.

Also lets remember that in WW1 Netherlands was not attacked either in WW1. Generally its just not worth attacking small neutral countries.

Banking is just one of many aspects, its simply false to claim that it is the major reasons.