I was actually considering including Estonia in my list, but they are not a member of the Nordic Council. And Estonia's Nordic bona fide is a matter of dispute. Personally, I believe Estonia to be a Nordic country, including having the Nordic Cross design variant of the Estonian flag hanging on my wall.

https://en.wikipedia.org/wiki/File:Estonian_alternative_flag... https://en.wikipedia.org/wiki/Flag_of_Estonia#Nordic_flag_pr...

Furthermore, in an article about military history, Scandinavia is understood - in a military geopolitical context - to only include Denmark, Norway and Sweden.