Beginner: Scouting

Scouting is using low-ranking pieces (usually scouts) to reveal your opponent's pieces, as to know whether to attack or avoid them with other pieces. Sergeants are also good for scouting, as well as miners, especially for pieces that have not moved, as they may be a bomb anyway. Lieutenants are also occasionally used for scouting, usually on pieces that have already moved, as lieutenants can defeat about half of all movable pieces, but losing one is generally not a big deal.