141.1.a. While on the Board: 141.1.a.1. Units are at one of several Locations while on the Board: a Battlefield or their Base. 141.1.a.2. Units and their details are Public Information while on the Board. 141.1.a.3. Units can be chosen, affected, or manipulated by spells, affects, or game actions that specify Units. 141.1.a.4. Units can be Killed. See rule 428. Kill for more information.