After Germany's defeat in World War I, the Allied Powers, under pressure from the French people, imposed fairly severe restrictions on Germany, including a ban on researching any heavy-firepower weapons.
Here, heavy-firepower weapons did not merely refer to aircraft and tanks. They also included machine guns, large-caliber rifles, and small artillery pieces.
Put simply, Germany's army could currently equip itself with rifles and pistols, while almost all other weapons fell within the scope of the research ban.
Historically, the birth of the submachine gun was largely caused by the Allied Powers' restrictions on Germany.
Unable to research larger-scale weapons, the Germans had no choice but to seek another path and invent an entirely new weapon: a submachine gun that used pistol ammunition but had a rate of fire comparable to that of a machine gun.
Britain and France paid little attention to the submachine guns the Germans were researching. On one hand, Germany's intelligence operations were excellent, and data on the newest submachine guns under development had not leaked.
On the other hand, Britain and France simply did not care much about submachine guns. After all, there had been a certain amount of development concerning such weapons in both countries.
However, neither country regarded this rather limited weapon as particularly important.
Submachine guns had powerful firepower, but their effective range and lethality were far lower. They were not suited for large-scale battlefields.
They were better suited to the infiltration and espionage wars of intelligence agents, which was also why Britain and France gradually relaxed their restrictions on German research into submachine guns.
Hitler did not know this. In his eyes, it was proof that Britain and France feared him and Germany.
Combined with Italy's tremendous success, this made Hitler resolve to develop even more powerful weapons and increase the German