In the context of the Ranger Handbook, which principle supports rapid movement to unpredictable positions?

The principle that supports rapid movement to unpredictable positions is maneuver. This principle emphasizes the importance of being able to move forces quickly and fluidly in order to gain a positional advantage over the enemy. By maneuvering, forces can exploit weaknesses in the opponent's defenses or change the dynamics of the battlefield, making it difficult for the enemy to predict where attacks will come from. This unpredictability can force the enemy to react defensively, allowing for greater operational flexibility and effectiveness.

In contrast, security focuses on protecting forces from threats and ensuring the safety of operations, which does not directly support rapid movement. Concentration involves gathering forces at a decisive point to overwhelm an enemy, but this is not synonymous with rapid and unpredictable movement. Surprise relates to creating opportunities through unexpected actions, but it is a consequence of effective maneuver rather than the principle itself.