You can assault an engaged opponent as long as they can actually reach base to base with the enemy.
When you allocate the wounds the model that gets the wound allocated uses their own armor save.
The footprints made in the sands of time are not made by sitting down... Unless your playing Warhammer WAAAGH!
New times calls for new Records:
Orcs & goblins (3-1-2)
Imperial Guard (0-0)