Sergeants

Sergeants (7 (or 4 in the European version)) are probably the most useless pieces in Stratego, as they are the lowest ranking pieces without a special ability, and as such, they are often best used for scouting and bluffing. Sergeants are also often put adjacent to bombs, as to defeat any miner that diffuses them.

Strategies
Sergeants are often placed in the front row or adjacent to bombs, and these are generally optimal places for them, as they will not get in the way of other pieces. Sergeants are some of the best pieces for scouting at the beginning of the game, so that you can save some of your scouts for later.