Your map makes it look like Belarus is the only European country that defied the European unification
How?
The only politic borders you can clearly see is Belarus, unless you look closely.
But Belarus is in east Europe.
No, it's in middle Europe - by some estimates, Europe's geographic middle is in Belarus (by most, it is believed to be in Lithuania, near Vilnius).
Well, you've provided a larger version of the pattern, so I don't need to now.
Don't forget to do the same for Turkmenistan.
The existence of Belarus as an independent nation seems an odd fact of history. It had never done so before the collapse of the Soviet Union, and yet it's a relatively stable nation, compared to the other 4 non-independent pre-soviet nations (Tajikstan, Turkmenistan, Kyrgyzstan, and Uzbekistan).
Well, counting out Kyiv (which was just all the East Slavs, when East Slav was one tongue), Belarus has also had significant independence as Belarusian Folk Republic (1918-1919), which today is the longest running government-in-exile and as the independent Soviet Belarus (1920-1922) (before the SSRU's making). Tajikistan used to be (and still are extremely related to) the Persians, so they had independence, too. I am pretty sure Kyrgyzstan and Uzbekistan had independent theodes, earlier, as well. And Turkmenistan is very stable, as far as I know.
Not unlike Ukraine, but Ukraine can only be traced back to the Kievan Rus', up until the Ukrainian citizens lived under many different countries' rule, and were independent for short periods of time before their extended period of independence following the collapse of the Soviet Union.
The Ukrainian hetmanates were nominally bit of Polandlithuania; they were independent.