High-intensity warfare uses up a LOT of artillery shells. Like, a lot. How much? Well, these charts from the Light OPFOR Tactical (for eastern calibers) and FM 101-10-1/2, 1987 edition (for western calibers) give a notional example. They’re not identical-the OPFOR norms chart is shells fired towards a target while the FM 101-10-1 one is shells used up by a certain artillery piece per day-but they both show how much metal and explosive is going to fly (the answer: A lot).
Artillery is called the “king of battle”, and the king can get very, very hungry sometimes. Moving large quantities of heavy, highly explosive shells is no small feat, and to succeed or fail with that task means the difference between victory and defeat. A conventional Fuldapocalyptic World War III in the 1980s would have a massive quantity of artillery shells fired every day.