...war is just to those for whom it is necessary, and arms are clear of impiety for those who have no hope left but in arms.
LivyThus, if there is anyone who is confident that he can advise me as to the best advantage of the state in this campaign which I am about to conduct, let him not refuse his services to the state, but come with me into Macedonia. I will furnish him with his sea-passage, with a horse, a tent, and even travel-funds. If anyone is reluctant to do this and prefers the leisure of the city to the hardships of campaigning, let him not steer the ship from on shore.
Livy