In ground attack position, penetration is the breaching of, and moving past, a defensive military line.
[1] Penetration is a strategic military maneuver much like the pincer movement with a few differences.
The penetration is carried out as part of a frontal attack when there is no assailable flank available.
It takes the form of assaulting the enemy positions, creating a rupture, widening of the gap and finally breakthrough.
Separate forces are earmarked for the assault and break-out stages of penetration.