One has to disagree as sharply as possible with assertions that wartime is not the time to make changes in the military.
Little could be 'farther' from the truth.
It's during combat that people let slide all their differences the most and focus on the fight in front of them. It's actually one of the best ways for people to learn tolerance, by bonding on issues that transcend petty difference.
If there is a cadre of backward leaning leadership, wartime is really the best time to clear the decks of the Queegs and create promotion opportunities for new, enlightened leadership. Nothing like times of combat to fully test prospective leadership mettle - it's a good time to be making people decisions, to be judging people by their unit-building effectiveness.