How did the Soviet Union respond to the U.S. policy of brinkmanship?

Chapter 16 The Transformation of the West -At the close of the civil war the frontier of continuous white settlement didn’t’ not extend far beyond the Mississippi  To the west was a population of more than 250,000 Indians -1893, historian Frederik Turner lectured “The Significance of the Frontier in American History”  Argued the western frontier the distinctive qualities of American culture were forged; individual freedom, political democracy, economic mobility  The west acts as a “safety valve”  The west is seen as a place of opportunity for those seeking to improve the condition of their life  Portrayed the west as empty space before American settlement o West was exact opposite A Diverse Region -The political and economic incor