In the period leading up to world war i, how did nationalism unite or divide citizens?

Nationalist wanted the same concepts uniting the citizens overall. Everyone generally unites as a whole against a common enemy. However, there were some states that wanted independence to make their own decisions.

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