Flanking maneuver
（重定向自Flanking manoeuvre）
In military tactics, a flanking maneuver, or flanking manoeuvre is a movement of an armed force around a flank to achieve an advantageous position over an enemy. Flanking is useful because a force's offensive power is concentrated in its front. Therefore, to circumvent a force's front and attack a flank is to concentrate offense in the area when the enemy is least able to concentrate offense.