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Cordon sanitaire
The Ural Mountains serve as a distinct geographic boundary between Europe and Asia, marking the eastern border of Europe and the western border of Asia.
The Stalin Line was the line of fortifications along the western border of the Soviet Union that began in the 1920's. This was to protect the USSR against western aggression, made up of concrete bunkers and gun emplacements.
A, Georgia.
Influence of Soviet Communism and CPSS were very profound
Georgia has 14 barrier islands along its coast. These islands serve as a natural buffer against storms and provide habitats for a wide variety of wildlife.
It is the source of military support for both countries
The rich forced landless whites to move westward towards the frontier to encounter the Indians and to serve as a buffer against them. pg. 54 of A People's History of the United States by Howard Zinn.
This hedgerow will serve as a sound buffer for the noise from the street traffic.
Europe
The eastern side of the Ural Mountains are the traditional dividing point between Europe and Asia. The Ural Mountains run north to south through western Russia, from the coast of the Arctic Ocean to the Ural River and northwestern Kazakhstan.
Europe, Asia, and Africa.