Corporate Janissaries (a.k.a. "War Guilds", "Sepoy Divisions") Starting in 1936, 3 years into the Third Great War, many nations suffered manpower shortages. At first, this was displayed in the non-essential divisions, such as food preparation, secretarial pools, logistics, road maintenance and construction, railway repairs, et al. Unfortunately, as the war began to drag on, the manpower shortages became greater, the demands for a reliable personnel infrastructure increased.
An exact count of the number of corporate janissaries remains incomplete, but according to the Maxwell's Status of War, as many as 10% of the war dead, and 30% of the war-dead included corporate janissaries, during the period of 1933-1951.
Although janissaries (indentured-military personnel) had been a part of warfare for centuries, the scale and nature of "total-war" and "scorched earth" policies meant that janissaries would have to take larger roles in combat. In many countries, private corporations would offer the services of janissaries in place of a substantial fee, allowing members of the merchant-class and upper-class avoid placement in the military drafts.
Often to assuage the nations under contract, the corporations would often accept as "indentured personnel" persons including political prisoners, religious excommunicates, death-row prisoners, social welfare recipients, indentured servants, and "ethnic second-classes". Unfortunately, this also meant that persons under the janissary flags were often subject to harsh treatment, sexual slavery, prostitution, et al. Second, since they were seen as "lower than filth", many of the janissaries were often the targets of mass atrocities, often ending in mass graves, death camps, and human experimentation.
The brutality of the treatment experienced by many janissaries has been documented in such books as I Dream No More by Steve Angeles and Where We Lay by Erich Engelhardt. Both books have been called the "Great Hammers", as arguments against slavery and indentured servitude.