Primitive War (2025)

In 1968, during the Vietnam War, a Green Beret platoon is attacked and killed in a remote jungle valley by unknown predators while on a classified mission. Their commander, Colonel Jericho, calls in Vulture Squad, a LRRP team consisting of team leader Sergeant First Class Ryan Baker, second-in-command Sergeant Xavier Wise, rookie radio operator Leon Verne, former Air Cavalry soldiers Eli Taylor and Charlie Miller, and snipers Gerald Keyes and Logan Stovall, to find the missing Green Berets.

After the Vultures are airdropped into the valley, they begin their search for the Green Berets, finding birdlike tracks and huge feathers from an unknown animal. Baker is attacked by an unseen creature, but drives it away. As the Vultures follow the Green Berets' trail through a cave tunnel, they are ambushed by a pack of Deinonychus; they escape but Baker and Verne become separated in the chaos. Meanwhile, the squad is tracked by a Soviet team called the Dogs of War, consisting of Tolstoy, Nikita, Sergei, Aleksandr, and Con Nhen, a Vietnamese guerrilla fighter. During their search, Aleksandr is ambushed and killed by the creature that attacked Baker.

After encountering and fleeing from a family of Tyrannosaurus rex, Baker and Verne are rescued by Sofia Wagner, a Soviet paleontologist, who takes them to her hideout at an abandoned research station. She explains that a science experiment overseen by USSR General Grigory Borodin accidentally brought a variety of dinosaur species into the valley, and that Borodin murdered her husband and coworkers for questioning him. As they search for the remaining men, Sofia identifies Baker's attacker as a larger, more dangerous species of raptor. The rest of Vulture Squad are attacked by the Dogs of War, with Keyes being shot in the leg. The fight is then interrupted by a flock of Quetzalcoatlus, which kill Tolstoy. Both squads flee, and the Vultures meet up with Baker, Verne, and Sofia before being attacked by the Deinonychus pack, which drag Keyes away. He fights them off but is fatally wounded by a larger raptor. Despite his injuries, Keyes manages to stab its eye and is rescued by the Vultures. After fending off another attack by the raptors, the squad escapes by boat, but a dying Keyes stays behind and uses grenades in a last stand against the raptors.

Sofia explains that Borodin's project is a particle collider that can create wormholes, intended to allow Soviet military forces to teleport anywhere in the world, and that a malfunction during its first test opened a wormhole that transported the dinosaurs to the present day. She convinces the Vultures to disable it, fearing global destruction. Baker contacts Jericho for extraction, but Jericho demands the collider stay intact until troops arrive to capture it. The squad are attacked by more Deinonychus, and Stovall sacrifices himself to save the others. At the Soviet base, Borodin's soldiers kill an infant T-rex, provoking its parents to attack.

As the tyrannosaurs massacre the Soviet soldiers, Vulture Squad plants explosives around the collider, while Baker and Sofia recruit a disillusioned Nikita and Sergei. Miller is attacked by Con Nhen, but kills her and himself by detonating his explosives. The tyrannosaurs leave with their chicks, while Sofia deactivates the collider. Jericho arrives with US reinforcements as a large pack of raptors attack, killing Borodin, Nikita, and Taylor, before Baker sacrifices himself to hold them off. Sofia, Verne, Xavier, and Sergei join Jericho's forces to fight off the raptors and a flock of Quetzalcoatlus, and escape as Vulture Squad's explosives destroy the collider. Jericho regrets the destruction, blaming the Vultures for losing the collider as it could turn the tide of the Cold War in favor of the US, but Sofia warns him that the damage is already done, as the dinosaurs have begun migrating out of the valley.