Every war since WW1 US leaves weapons and equip behind.
But we always bill and get paid later. It's only been a couple of years since Britain paid its final bill to us for for WW2, down to the last bullet and choc. bar.
Last 5 wars, US lost, yet, when dust settles, we were paid for all losses.
US is about 240 years old, been at war or action 228 of them.
US is in the 'war business', all we make are weapons, and mercenaries for rent.