bio_hazard
Prince
The only thing I wonder about these small stacks is that if they contain artillery or are escorting settlers/workers, bigger may still be better, because lets say a defense can wipe out one stack per turn (out of six stacks,say), each turn it will capture some of your units to use against you in the future. One big stack might fall more quickly than all six little stacks, but you won't give the enemy any units until that whole stack is defeated.
Slightly off-topic, but do we know anything about how the AI in Civ IV will decide which units to build? In Civ III, the computer seemed to have knowledge of what was in cities even before espionage. Will it always build a balanced arsenal no matter what, or will it "cheat" and see you building a bunch of horsemen or archers and then emphasize the appropriate counter? If not, monomorphic stacks may still be pretty successful, at least early in campains, since it may take the AI a while to adapt. It would be pretty cool if the AI was responsive enough that you could 'feint' with a small force of one unit type, get it to switch production, and then have the counter to their new units ready to mop them up.
Slightly off-topic, but do we know anything about how the AI in Civ IV will decide which units to build? In Civ III, the computer seemed to have knowledge of what was in cities even before espionage. Will it always build a balanced arsenal no matter what, or will it "cheat" and see you building a bunch of horsemen or archers and then emphasize the appropriate counter? If not, monomorphic stacks may still be pretty successful, at least early in campains, since it may take the AI a while to adapt. It would be pretty cool if the AI was responsive enough that you could 'feint' with a small force of one unit type, get it to switch production, and then have the counter to their new units ready to mop them up.