Because hitler saw them as "unpure" races.
I am not so sure what you mean by "what kinds of unions were formed", but if you're talking about the Civil War then I think the unions were Confederate and Union. The Confederates wanted to run the country with slavery while the Union fought against slavery. Do not quote me on that though.
Answer:
Peter the Great was a Russian czar in the late 17th century, who is best known for ... He created a strong navy, reorganized his army according to Western ... and introduced new administrative and territorial divisions of the country. ... troops to the city of Poltava, in the midst of an unbearable Russian winter.
Explanation:
