Yes. If required, all US citizens between the ages of 18 and 25 may be called upon to defend the nation, if it is attacked. There is no compulsory military service for US citizens but 25 other countries around the world require their citizens to take military training.
The treaties were used to remove the Cherokee and other native American tribes from their lands by telling and persuading them that they would be moved to a better 'more civilized' place for new life opportunities.
