Bernie has enough respect from the military that they will follow him. Hillary's actions in the cabinet have some of high command questioning her, and Trumps statements have some of high command saying they will not follow certain orders if he is elected president, and this is from a morale stand point.

"I have this Nightmare. I'm on 5th avenue watching the St. Patrick's Day parade and I have a coronary and nine thousand cops march happily over my body." Chief Sidney Green