This is a map of the Soviet Union (the USSR).
People speak Russian in Russia and in 14 former Soviet Republics (now, independent countries):
Ukraine, Belarus, Moldova, Estonia, Lithuania, Latvia, Kazakhstan, Uzbekistan, Tajikistan, Kyrgyzstan, Georgia, Armenia, Azerbaijan, Turkmenistan.
The country where I was born. - Страна, где я родилась.
https://en.wikipedia.org/wiki/Soviet_Union