An economic change introduced in the soviet
union under joseph stalin would include
(1) establishing free-market reforms
(2) boycotting baltic sea trade routes
(3) focusing on the production of consumer
goods
(4) collectivizing agriculture

An economic change introduced in the Soviet Union under Joseph Stalin would include "(4) collectivizing agriculture" but of course there were many other things as well. 

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