Attrition for Units
...So marching 20,000 men with War-Elephants through a low supply area meant they lost the same manpower as 20,000 Light Infantry.
This have now been changed, so that Light Infantry costs 50% of a normal unit supply, Heavy Infantry & Heavy Cavalry cost about 50% more supply, while War-Elephants costs 500% of normal supply.
The impact of this is that 10,000 Light Infantry will require a Supply Limit of 5 to not take attrition in a non-desert province, while 10,000 War Elephants require a Supply Limit of 50 to not take attrition, and 10,000 Heavy Infantry would require a Supply Limit of 15.
This means that different terrain and areas have needs of different types of armies for efficient warfare....