Manœuvre de flanquement

In military tactics, a flanking maneuver is a movement of an armed force around an enemy force's side, or flank, to achieve an advantageous position over it. Flanking is useful because a force's fighting strength is typically concentrated in its front, therefore, to circumvent an opposing force's front and attack its flank is to concentrate one's own offense in the area where the enemy is least able to concentrate defense. Flanking can also occur at the operational and strategic levels of warfare. The flanking maneuver is a basic military tactic with several variations. Flanking an enemy entails attacking from one or more sides, at an angle to the enemy's direction of engagement. There are three standard flanking maneuvers. The first maneuver is the ambush, where a unit performs a surprise attack from a concealed position. Units friendly to the ambushing unit may be hidden to the sides of the ambush site to surround the enemy, but care must be taken in setting up fields of fire to avoid friendly fire. Ambush as a tactic is typically favored by smaller, more mobile forces, usually ones with favorable terrain. An example of this would be the Battle of Beaver Dams, where the British ambushed the Americans, halting their advance further inland to Canada. The second type is used during an attack, where a unit encounters an enemy defensive position. Upon receiving fire from the enemy, the unit commander may decide to order a flank attack. A part of the attacking unit pins the enemy in place with suppressive fire, preventing them from returning fire, retreating or changing position to meet the flank attack. The flanking force then advances to the enemy flank and attacks them at close range. Coordination to avoid friendly fire is also important in this situation. This is employed largely by forces meeting each other with equal strength. The third form of flanking maneuvers is the double envelopment, which involves simultaneous flank attacks on both sides of the enemy. An example is Hannibal's victory over the Roman army at the Battle of Cannae.