We talked a lot about the activation system in Muskets & Tomahawks on the podcast episode, so I'll try to be brief here. You get four cards for each unit type (regulars, skirmishers, etc.) present in you army, even if it's only a single unit of that type. All the command cards plus two special cards of both players plus three clock cards are mixed together to make a deck. Each player draws a hand of three. On your "turn" you play a card and activate all the units of said faction and type - say, British Regulars. You can play enemy cards, too - in which case the enemy activates, but you get a valuable command point.
