Logistic is hard.
“you can see why logistics gets complicated fast. Even in explaining a rule of thumb, I have to resort to rules of thumb, or else we have to inventory all of the stuff an infantry brigade needs, and all of the food they need and then parcel it out by wagons (and then figure for the mule-or-horse teams for the wagons) and on and on”
https://acoup.blog/2019/10/06/new-acquisitions-how-fast-do-armies-move/