frekk said:
Surprisingly, they could actually send signals over quite vast distances. The reason we call them telegraphs is that they would operate in relays as a grid of points connected by straight lines-of-sight, so theoretically there was no limit to the range, for instance the Roman smoke tower relay net was estimated to be about 4500 km long at its greatest extent. Of course, the farther the message had to be sent the longer it would take. Other telegraphic systems were in use even among very primitive groups, for instance the Plains Indians would signal with mirrors, and in jungle terrain the drum was frequently used as a signal relay (eg in Mexico, Central America, Africa, parts of Asia) because line of sight was impractical.
Im not going to debate you over this, because I do agree. Of course there was a lot of factors why armies fought the way they did at different times, but communication is by far the most important element in any war, both in a strategic level and tactical. These comunication devices were very crude and easy to missunderstand using complex signals and not to mention slow, if anyone got a message wrong in the chain it would be distorted, we have all played that little game now haven't we. Whisper a sentence in once ear and pass it on, don't take many persons to get a very strange result in the end.

(even if you are serious and repeat the message)
Supply was something many civilized empires were very good at. For example the Romans, they managed to supply their field armies quite efficiently even in enemy territory by using chains of fortresses with small garrisons.
But I agree, logistics is one thing that was harder, but even worse if you divided an army. Often smaller units operated in a larger area from a central supply area where either a fort or city was located in the ancient area up through the Middle Ages where more modern technology in both communication and travel were invented.
Im not saying that I like the stack of doom; I just say that it is more reasonable that wars were decided by decisive battles rather than a coherent front.
As it seems there is no difference in fighting style with land units during the ages and that is something I would like to mod if it is possible. Logistics is something that is totally lacking in the game; the player also has an unrealistic omnipotent view of all action, and something you might only have in a modern war. There should be as you suggested a system who allow you to move, not a certain units but stacks, logistical rules would handle the number of units to be moved depending on where they are.
frekk said:
Small elite forces should be very effective - the civ3 system of elite troops really does not do justice to what an elite force can do, or how difficult it is for even very large regular units to prevail over a small number of elite defenders. This was equally true in the ancient world.
But we don't know if the engine will support that, the other Civ did a poor job of supporting small elite forces, since different support cost, requirement of certain buildings to build units etc is not a factor.
Without this, elite would be quite common. Most war is won by the common man, not the elite, a battle perhaps but not wars.
Pillaging and plunder should also be more lucrative, as should sacking av cities were you take their treasures and leave, why bother sometimes. The logistics of retaining a city should cost more than it gives in the beginning.