Answer:
Main argument made by author of point was It will weaken the American citizenship.
Step-by-step explanation:
Mandatory means compulsory civil service. Such services are enforced in times of war and crisis. Arguments made by the author of a point is that this compulsory military service would make American citizenship weak.
This compulsion would force many men to leave America. This compulsion will be taken as a burden and citizens will try to evade their duties. The Willingness of citizens should be given priority rather than forcing them to join military services.