Answer:
As to your question, mandatory military service (aka the draft) has been done here in the past. And apart from a world war, it shouldn't be used.
The reason I say that is when a draft is in place, you have people who are serving who have no desire to be there. When you have that, disciplinary problems increase, desertion and AWOL rates go up. Commanders then have to deal with the malcontents through various punishments, which consume an inordinate amount of time.
Further, you would have to increase the size of the Military Police to deal with the increases in disciplinary problems and the resultant crime. It all adds up to a bad situation.
We have never fielded a more professional military prior to the all volunteer military. These folks serve willingly and are less likely to have disciplinary problems. They also take their craft seriously and perform at a better standard than in decades past when we did have a draft.
Explanation:
