Your military consists of your standing army and up to five separate attack brigades. All military is maintained in the standing army, unless sent out on planned strike attacks. When deploying an attack force, your selected forces will automatically be placed in an available brigade. When the attack is complete, your forces will be returned to your standing army. From this menu, you will be able to see the status of all of your military forces.
Your standing army is always available for defense. If all five of your brigades are resting from a planned strike, you may not send any more attacks until a brigade has been sent back to your standing army..
On any attack you make, the forces used are temporarily placed into a brigade. For all attacks, except planned strikes this is done immediately. Each game server has different lengths of time for which a planned strike brigade will rest, but in most cases this is 20 hours. Each country may only have a maximum of 5 brigades, so if you do 5 planned strike attacks in a short period of time, you will not be able to make any more attacks until at least one of your brigades opens up.