Easy: Switzerland comes to mind for example, unless you also count as involvement looming starvation from supply chain issues and accidentally getting bombed du

Easy: Switzerland comes to mind for example, unless you also count as involvement looming starvation from supply chain issues and accidentally getting bombed due to navigation failure and/or preventing that by violent means. How many of the Caribbean states have been involved in wars? (I know Cuba had a civil war that occasionally appeared more external than civil wars reasonably should) A hundred years isn't a very long time.