If you have the units and the leader in your town you can create the army, and most probably use it to the full movement points immediately. And yes, that's RoP Rape.
To create the army, make your leader the active unit. There will be two buttons on top (or middle if you have advanced worker buttons turned on). One will be Hurry Improvement, the other will be Build Army. Select the Build Army. The leader will immediately turn into the army unit. Then you load the army much as you would a transport. But once you put units in, you can't take them out. So be careful choosing which units to put into it. Most people like to use Elites that have already generated a leader and are at the end of their upgrade path (such as a Calvary), but of course you can put whatever unit you want in there.
Good Luck!
Edit:
You could also 'bounce' the AI SoD. Find a city outside the range of the fastest unit, and empty all units from that city. The AI SoD should change course to the undefended city, and you can have an extra turn or so to pick them off. And if you keep doing this, one turn this city, one turn a different city, the AI will keep bouncing around your territory for the empty city. You can then use your calvary to pick off the SoD.
To create the army, make your leader the active unit. There will be two buttons on top (or middle if you have advanced worker buttons turned on). One will be Hurry Improvement, the other will be Build Army. Select the Build Army. The leader will immediately turn into the army unit. Then you load the army much as you would a transport. But once you put units in, you can't take them out. So be careful choosing which units to put into it. Most people like to use Elites that have already generated a leader and are at the end of their upgrade path (such as a Calvary), but of course you can put whatever unit you want in there.
Good Luck!
Edit:
I'm pretty sure that's not accurate. At least, in C3C I'm fairly sure that you can load and move in the same turn. Also, the AI tends to not attack stacks with armies in it, so even if the moves are sacrificed you might luck out and they'll avoid that city.klopolov said:You can select a leader when he is in the city and click build army button, then select a unit you want to add to the army and click load button; do it to all three units and you have an army... But they do lose their movement for that turn...
You could also 'bounce' the AI SoD. Find a city outside the range of the fastest unit, and empty all units from that city. The AI SoD should change course to the undefended city, and you can have an extra turn or so to pick them off. And if you keep doing this, one turn this city, one turn a different city, the AI will keep bouncing around your territory for the empty city. You can then use your calvary to pick off the SoD.