What countries once formed czechoslovakia? select all that apply. chechnya slovakia slovland the czech republic

The two countries that once formed Czechoslovakia were Slovakia and the Czech Republic.

Once part of the Austro-Hungarian Empire and consequently part of the Soviet Union, the dissolution of Czechoslovakia accompanied the disintegration of socialist federal states. On the opposite of what happened with USSR and Yugoslavia, the separation of Czechoslovakia  occurred without any violence on 1 January 1993.

a. because the u.s. was the leading with the most technology, economy, etc. also was teamed with other allies witch boosted the economy and materials to improve technology and use it.

a.tensions between the colonial elites and the backcountry men of virginia.