War takes its toll on equipment, as well as men. In some cases, it wears out. In other cases, enemy fire or accidents destroy equipment. The USA has recognized this fact by funding wartime replacement expenditures as supplemental funding, which is outside the normal budgetary process. The intent is that this money will be spent on replacing equipment that has been worn out, damaged or destroyed, or will be used to provide specialized capabilities like MRAP mine-resistant vehicles that are directly related to front-line demands.
Admittedly, this hasn’t always been true. Politicians are what they are, and so are large organizations like the military. One area where this ethic has undoubtedly been honored, however, has been the AH-64 Apache attack helicopter fleet. This article covers US Army Wartime Replacement Aircraft (WRA) AH-64D Longbow buys, which are the only truly new attack helicopters in the America’s inventory. That will change with the new Block III model, which is more advanced than the WRAs.