A secret military program weaponizes humans through Nazi-inspired science

Entertainment · Published 19 October 2026 Swipe more like this →

In short: In a remote New Mexico facility, a trio of super-soldiers was engineered to be the ultimate tools of state violence. These subjects were chosen for their lack of mercy and modified to possess superhuman durability and a relentless drive to kill, eventually escaping to terrorize a civilian trailer park.

The film Onslaught explores a dark continuity involving the KPG, a fictional secret security entity. This organization is depicted as evolving from the events of You're Next and The Guest. In Onslaught, the KPG's super-soldier program is further explored through the work of Dr. Hans Kammler, a descendant of a Nazi scientist. Kammler, played by Dan Stevens, conducts research for the United States government to develop three specific subjects: Crybaby, Cockroach, and the Butcher.

The US military chose these combatants for their capacity to endure and execute targets ruthlessly. By undergoing mental training and physical operations, the group acquired superior power, stamina, nocturnal sight, and the skill to simulate deceased states by regulating pulses. The film depicts a successful demonstration of these capabilities against civilian populations, as the trio slaughters residents of a trailer park. The government's goal, as revealed by the character Hanna Kammler, was to observe their performance in a real-world setting rather than engage them.

The narrative centers on Celeste Cross, a former Army sniper, who must protect her daughter from the trio. The film establishes a personal vendetta between Celeste and the Butcher, a former martial artist-turned-super-soldier. Despite the film's mixed critical reception—earning a 57 out of 100 on Metacritic and a 'C' on CinemaScore—it serves as a pivotal entry in a trilogy. It sets up future installments that will explore the relationship between the characters of David Collins and Hans Kammler within the KPG framework.

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