Murinius

Murinius is a "real world fictional" country, meaning that it was created not in an environment that is generally concerned with literature or cinema. This land is located to the east of Estonia and was created so that Estonian army could practice its actions in case of intervention. Since the training took place by the Russian border, one could surmise that Russia is the real country behind Murinius.  https://www.bbc.com/russian/news-44114394