What factors do you think determine whether or not the united states intervened militarily in other nations?

The United States mediated when fundamental United States interests and resources American lives, majority rule government, oil were in question. 
The elements caused the finish of the Cold War: 
occasions in the Soviet Union 
occasions in Germany and Eastern Europe 
how U.S. pioneers reacted to those occasions

Cherokee  removal, part of the trail of tears, refers to the  forced  relocation between 1836 and 1839 of thecherokee  nation from  their lands ingeorgia, south carolina, north carolina, tennessee, texas, and alabama to the indian territory (present day oklahoma)  in  the thenwestern united states, and the resultant deaths

What effect did the development of trade have on settlement patterns in medieval times