Stack Units?

[NakaNaka]

How do you stack units??

[Yossarian]

Heh just move one on top of another. If you mean how do you build an army, you have to choose it in a city build queue.

[NakaNaka]

what you mean i can build individual units but i want to put them together so they can fight together (and move together etc)

in civ2 you stacked them .... what do you do in civ3

[Ecthy]

I can't remember you could stack units in Civ2

[Drago Sinio]

You need a leader, which is created sometimes when an elite unit wins a battle. You can then move the leader into a city, and issue the "Build Army" command. The leader then appears holding a flag, so you know he now represents an army. You can then group three units together as an army. This is done by selecting the unit you want, and pressing "L". The 3 units you select this will now move and fight together, indicated by the flag carrying guy.

(Although leaders seem to be rare, and I think they might be more valuable when used to rush a wonder. )