The last country in the world to challenge the United States control of Oregon was Great Britain. Oregon was won in the War of 1812.
Nazi leader Adolf Hitler violates the Treaty of Versailles and the Locarno Pact by sending German military forces into the Rhineland, a demilitarized zone along the Rhine River in western Germany.
<span>many ethnic groups wanted their own nation-states</span>
<span>Progressive Era reformers at the turn of the century successfully compelled local governments to introduce 'civil service systems' to replace political machine.</span>
