"Moving an army into an encampment well away from civilians is a useful thing to do. Soldiers no longer have easy access to the "demon drink" for start! Separating troops from civilians also allows better training and indoctrination. Regiments have the space to practice drills and instill discipline in their men. Civilians also have funny ideas, and it is often best if common soldiers do not learn of their freethinking and sometime disloyal ways.