The plan has 3 phase from what i understand.
1. Phase withdraw to create void for the enemy to occupy, while in the process of occupying the void the enemy will stretch their supply line and make it vulnerable to an enemy attack, thus they need to protect it but because all available men is used for the push to the void they use all of the reserve men to protect the supply line, thereby weakening the headquarter of the enemy.
2.Phase attack the enemy headquarter by using a shock or commando troops by using long range transport (in this case rocket) and cause as much havoc as possible to cut the enemy ability to command, by doing this the enemy pushing army at tactical level will lose strategic situation and immidiately stop to confirm order or to reorient their situation.
3.phase while enemy stop in confusion on unfamiliar terrain undefended(not digging in) with streeched supply line and command in chaos, spring counter attack as fast as possible by flanking and initiate breakthrough to encircle the enemy thereby destroying the entire army.