Armoured vehicles can be made quite resistant to attack by eg shells, using clever, multi-layer armour.
Today’s invention seeks to lessen that resistance.
Imagine firing two shots in very quick succession. The penetration power would be much greater, since both impacts would occur at the same spot.
It’s hard, however, to have even an autoloading tank gun reload and fire quickly enough to achieve such a ‘double tap’ with heavy ammunition.
Instead then, fire shells which have a heat retaining rear end (or flare) to act as tracers.
Normal, relatively cheap, heat-seeking rockets carried by ground troops can be automatically triggered and fired within a second of the tank’s shot, so that the missiles follow and catch up with the shell.
This results in several items of ordnance arriving at the target almost simultaneously.