December 30, 1922 is marked as, without any doubt, a very important historical event – the treaty on the formation of the Union of Soviet Socialist Republics (USSR) was signed. 100 years since the signing of the treaty is a very symbolic date, and a good reason to come up with some sort of a summary. Even more, so that the date of 100 years happened to also be the year of the most severe military conflict that is taking place today, between the two largest fragments of the once powerful country – Russia and Ukraine.
