Essentially, you battle other players in a game played similar to Final Fantasy Tactics Advance.

You get a starter 'deck' of soldiers, lvl 1 farmer types, and battle other players, or NPCs for gold to hire more, and gain the pieces experience to level them. Every so many levels they can choose a career path, ever refining it with every evolution. The battles are played on a multi-terrain grid, just like any popular tactics game.

For the MMO aspect, you can fight other players. If they're offline, you gain some experience, and a low amount of gold for your trouble. If they're online, it plays a little like chess. You move your pieces, and they move theirs. There could also be long-term battles where you fight another player, and each player moves all their pieces, then waits for the other player to come back online.

If the other player is offline, like I said, you get some gold and some exp per soldier that's seen action. If you're playing someone online, winning gets more gold, more exp per soldier, and you get to steal one of their soldiers. This can be entirely random, or if you want to add some strategy, have some sort of net one of your soldiers throws over one of their already downed soldiers. This will make them think twice before putting anyone too useful out on the front lines.