Why was the end to communism in Czechoslovakia termed the “Velvet Revolution”?

Why didn’t the united states participate in the league of nations? the u.s. senate did not want the country to join. president wilson did not want the country to join. the league of nations was only for european countries. the league of nations had failed to prevent world war 1

How were slavery and indentured labor in american colonies similar

What were 3 advantages to rail road growth