History /
Questions about Polish borders, Galicia and Cossacks. [50]
Its simple the Kresy region is Ruthenian. It has always had an overwhelming Ruthanian majority that's why today we have two Independent Ruthenian nations their, Ukraine and Belarus, very simple.
The Poles have been tried to Polanise the local population (ruthenians) since the the Polish-Lithuanian Commonwealth.
The Grand Duchy of Lithuania had a Ruthenian Majority:
en.wikipedia.org/wiki/Grand_Duchy_of_Lithuania#Demographics
In 1260 the Grand Duchy of Lithuania was the land of Lithuania, and ethnic Lithuanians formed majority (67.5%) of its 0.4 million population.[33]
With the acquisition of
new Ruthenian territories, in 1340 this portion decreased to 30%[34] By the time of the largest
expansion towards Rus' lands, which came at the end of the 13th and during the 14th century, the territory of the Grand Duchy of Lithuania was 800 to 930 thousand km2, just 10% to 14% of which was ethnically Lithuanian.[33][35]
An estimate of the population in the territory of Poland and Grand Duchy of Lithuania together gives a population at 7.5 million for 1493, breaking them down by ethnicity at
3.75 million Ruthenians (ethnic Ukrainians, Belarusians), 3.25 million Poles and 0.5 million Lithuanians.[36] With the Union of Lublin, 1569, Lithuanian Grand Duchy lost large part of lands to the Polish Crown.