For example, a player wishes to add a DF-90 Mortar Trooper to their army. Because the DF-90 Mortar Trooper has the Detachment: Shoretroopers keyword, the player must first add a unit of Shoretroopers to their army before adding the DF-90 Mortar Trooper. The player does so, and the army now contains a Shoretroopers unit and a DF-90 Mortar Trooper unit. The player then wishes to add a second DF-90 Mortar Trooper unit to their army, and therefore must first select a second unit of Shoretroopers to include in their army.