In battle, you give action orders to your troops in battle by matching three indentical tiles which corresponds to their troop category. So if you want your infantry troops to attack, match the Infantry tile. If you want your cavalry troops to attack, match the Cavalry tile. You get the idea. Troops under the “Support” category may do an action like healing or buffing team members instead of attacking. Getting an action in this way is called “Normal Attack” or “Normal Action”.