Everyone from England to Bulgaria was involved in WWI. What did the countries that were not active players doing during this time? Surely the war would have forced itself upon their lives in one way or another.
hi! There's lots of room for more input here, but you can get started on these earlier posts
Why wasn't Spain more involved in the World Wars (particularly WWI)?
What happened in Neutral European countries such as Switzerland and Sweden during WWI and WWII?
... didn't find anything on Albania; didn't look for 'northern countries' as I wasn't sure whether you meant Benelux countries, Nordic, or other