A loud explosion went off as a shell struck a Panzer I… The explosive blast was sufficient to damage its front plate, which was where the armor was thickest.
In fact, the shell surprisingly bore through the rolled homogenous and sloped armor of the Panzer I and caused what would have been a confirmed kill of the entire crew inside had the vehicle in question not been derelict for testing purposes.
The shell had been fired by a 5cm PaK 38, or a 5cm PaK 15, as it was known in this timeline. In fact, the shell was not an ordinary high explosive shell fired by artillery, but rather a dedicated Armour-piercing ballistic capped high explosive tracer shell developed over the course of the last five years deliberately to counter the eventual introduction of Allied Tanks.