> Let’s take Total War: Rome II as an example: a unit of Roman (auxiliary) African elephants (12 animals), costs 180 upkeep, compared to 90 to 110 upkeep for 80 horses of auxiliary cavalry (there are quite a few types) – so one elephant (with a mahout) costs 15 upkeep against around 1.25 for a horse and rider (a 12:1 ratio). Paradox’s Imperator does something similar, with a single unit of war elephants requiring 1.08 upkeep, compared to just 0.32 for light cavalry; along with this, elephants have a heavy ‘supply weight’ – twice that of an equivalent number of cavalry (so something like a 2:1 or 3:1 ratio of cost).
> Believe it or not, this understates just how hungry – and expensive – elephants are. The standard barley ration for a Roman horse was 7kg of barley per day (7 Attic medimnoi per month; Plb. 6.39.12); this would be supplemented by grazing. Estimates for the food requirements of elephants vary widely (in part, it is hard to measure the dietary needs of grazing animals), but elephants require in excess of 1.5% of their body-weight in food per day. Estimates for the dietary requirements of the Asian elephant can range from 135 to 300kg per day in a mix of grazing and fodder – and remember, the preference in war elephants is for large, mature adult males, meaning that most war elephants will be towards the top of this range. Accounting for some grazing (probably significantly less than half of dietary needs) a large adult male elephant is thus likely to need something like 15 to 30 times the food to sustain itself as a stable-fed horse.