Originally Posted by Darvin
Common sense guys: how can a soldier march faster on a road than he can on a grass field? Don't let gaming logic (roads = faster movement) override your real world sense.
To a marching army, a road means relatively little. So long as we're not talking about rough, mountainous terrain you can make almost the same time on a road as you can marching through an open field. So a speed bonus makes little sense.
Where roads are useful is for vehicles like carts, wagons, or siege weapons. A wheel works best on a uniform, flat surface, and a road lets them operate ideally with little chance of damage. When moving large amounts of supplies, a road is invaluable.
If anything, a road represents a supply line in which carts and wagons are transporting goods. Protecting a road is therefor critical to the smooth operation of the military or empire they are supporting. The soldiers themselves, however, are not necessarily bound to the roads at all.
its not that the army moves faster
its that they tire alot slower due to less hills and stuff to step/climb over