Fire and maneuver
Fire and maneuver is closely related to the exchange of fire theory. The concept is fairly basic. In order to prevent the enemy to effectively engage your own troop while you are maneuvering , one part of your forces will engage the enemy with enough firepower to prevent the enemy to effectively move or return fire.
In a situation where you are limited by numbers such as in MNB:Recon it is important to move your units rapidly away from the contact while the remaining of your team engage the enemy. If you are facing a superior or well organized force, you may opt to keep 3 shooters engaging the enemy while one Ranger peels of the line. Subsequently, the moving ranger will take a shooting stance and cover the next ranger off the line.