Karl Wagner is a disgruntled middle-aged instructor at the Bundeswehr Command and Staff College. He finds himself concerned about the direction which the German nation is headed in—just as he is killed by a terrorist attack. Only to awaken and find himself reborn as an infant, Bruno von Zehntner, the youngest son of a noble family renowned for its part in the German war industry a few years after the founding of the German Empire. Bruno, as he is now known, desires to rewrite history and ensure the German Empire emerges victorious in the coming century. And in doing so, finds himself entrenched in a world filled with Blood and Iron!
Currently, the British Royal Armouries were testing a variety of weapon designs to deal with German Panzers. Whether it was large and powerful mines that could be embedded in the ground and triggered by a weight far greater in force than a human being could muster.
Or by creating a much larger caliber rifle. This, of course, being significantly harder to manufacture and test than some of their ideas because of the overwhelming pressure of such rounds, and the need for the chamber to contain it.
However, there was one mad lad among British Engineers who decided that maybe, just maybe, they should try to modify a normal spigot mortar to be fired in an arc directly at the oncoming German Armor.
In Bruno's past life, during the second world war, this was among Britain's first attempts to replace obsolete "Anti-Tank Rifles" that were normally chambered in something akin to 20mm. And the nickname for the device was the Blacker Bombard.