In your first language you most of the time hear what's correct. But when you learn a second language you don't always trust your knowledge... I was unsure if there should be a definite article before Ukraine - so I googled and found this enlightening article. The correct name is Ukraine, without a definite article (the).

"Ukraine or the Ukraine: Why do some country names have 'the'? - BBC News" https://www.bbc.com/news/magazine-18233844