a big question about the environment at that time

[血荐轩辕]

ok,I wonder what kind of horse that have the advantage ?The horse that only eat grass and the horse eat grain and grass.Is the mongolian horse that only eat grass play any part in there conquest?

[QuintusSertorius]

ok,I wonder what kind of horse that have the advantage ?The horse that only eat grass and the horse eat grain and grass.Is the mongolian horse that only eat grass play any part in there conquest?

Yes, if your mounts can subsist on just grass for long periods of time, it significantly reduces your fodder requirements. If means you only need to carry grain to feed your men, not your horses, which means you can travel lighter and faster. For a steppe army, where each mounted man will have a string of 4 or more ponies, the fodder requirements would be prohibitive if they all had to be fed oats, barley, or whatever as well as grass. Multiply that up to thousands of men and its a major logistical boon.

[Brennus]

Regarding horses in Britain, the wild species (Equus ferus ferus) appears to have been hunted to extinction in during, or shortly after the last ice age. Horses (Equus ferus caballus) were reintroduced to Britain during the Bronze Age. The lack of juvenile horses on some British Iron Age sites has led to the suggestion that feral herds, similar to the modern Dartmoor pony, were used a source of horses. Selective breeding of horses did not occur until the arrival of the Romans.