2-135. The corps echelon is where properly conceived and employed MILDEC is most likely to succeed and mislead enemy commanders as to the true disposition, capabilities, and intentions of friendly forces. Divisions and lower echelons often lack the density of forces and capabilities to successfully deceive a regional peer enemy. Tactical headquarters employ TAC-D measures assigned by a higher echelon headquarters or develop their own measures to support their own concept of operations. These measures must be nested. +The tactical headquarter’s higher echelon headquarters must vet and approve all TAC-D operations. TAC-D requires synchronization across multiple domains and echelons. An enemy is not likely to be deceived when friendly actions do not match the available information. Tactical units assigned to conduct MILDEC activities are often not informed of their mission’s true purpose.