Troops are used against either the goblins on the campaign map, or other players in order to win Trophies and loot Gold and Elixir - this is called raiding. Troops are created in Barracks and are stored in Army Camps.
Currently, in the Home Village, there are nineteen different types of normal troops, twelve of which require Elixir and are trained in the normal Barracks; the other seven require Dark Elixir and are trained in the Dark Barracks. There are three Hero troops as well. In the Builder Base, there are ten different types of normal troops, which are trained in the Builder Barracks. There is one Hero troop as well, namely the Battle Machine.