From Guide For Squad Leaders (PAM 350-12: HQ, Dept. of the Army, May, 1967), Chapter 2, 31(c), p. 30, dealing with the responsibilities and traits of good leaders and leadership in the military:

c. Supplies. The squad might have inadequate food, water, heat, clothing, equipment, weapons, ammunition or space (squad bay, bunker, or tent overcrowded).

It is the duty of the leader to insure adequate equipment. This is responsibility of every leader, from the Fire Team to the Commander-in-Chief.

I apologize for not citing the FMs on Military Leadership, but I happen to have the PAM right at hand.