2-204. FM 3-90-1 and FM 3-90-2 provide the foundation for movement and maneuver during large-scale combat operations. Corps, division, and BCT commanders normally do not specify the form of maneuver to be adopted by subordinate units. However, the assignment of missions and tasks, AOs, and the allocation of forces may impose such limitations on a subordinate unit that its commander has little choice on the form of maneuver adopted. Tactical commands normally employ a combination of the six basic forms of maneuver—envelopment, flank attack, frontal attack, infiltration, penetration, and turning movement—in their performance of the four offensive tasks. The distinction in the form of maneuver adopted by a tactical echelon exists primarily in the intent of the echelon commander, since the subordinate elements may use other forms of maneuver. Chapter 5 addresses tactical enabling tasks. Chapters 6 and 7 address maneuver in the defense and the offense respectively.