system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does a war neutrality work? For example, why didn't Germany just invade Switzerland and ignore its neutrality?
gpt
It had little to do with Swiss neutrality. Switzerland is a castle of a country. It's set in very mountainous area with only a few strategic roads and railways that offer quick movement across it. These all have bridges and other expanses that can easily be blown to slow down an invading force and cause a high number of casualties. It's strategically not very important if you already control most of the surrounding countries like Germany did. This wasn't set in stone there were a number of border skirmishes and fights that spilled into Swiss territory and Nazi Germany had plans to invade (Operation Green)