Vast flat areas does NOT describe the land of the Czech Republic.
Explanation:
it is a very red hot liquid that is found inside the volcano or we can also say that it is found below the earth's surface...
I would say that the US and the Soviet Union at the end of WWII withdrew their troops as soon as a demilitarized zone was created. Also, I am sure they would require a peace treaty to be signed with Germany before withdrawing troops.