WARNING: The following article contains spoilers for director Julius Avery's Overlord, in theaters now.

Overlord is an exciting and terrifying World War II horror film that delivers thrills while allowing its heroes to gun down more Nazis and zombies, and Nazi zombies, than Castle Wolfenstein. By the end, the protagonists have not only saved the world from a potential “thousand-year Reich” powered by super-soldier Nazis, but also proven integral to one of the deciding battles of the war.

Here’s exactly where everything stands at the end of Overlord, and how its events could come back to haunt the world.

The War Effort

Overlord

The main mission for the Allied soldiers in Overlord is to bring down a radio tower in a small French town, which will allow air support to communicate with the D-Day invasion forces. That mission becomes more difficult when they learn of the laboratory beneath the church and the monstrously mutated Nazi soldiers created inside. Seriously outnumbered, the Allied paratroopers split up and attack the base from inside and from out.

REVIEW: Overlord Is (Almost) Everything You Want From a Zombie Nazi Movie

The plan to destroy the foundation of the stronghold with C4 is complicated by the return of Dr. Wafner (Pilou Asbæk), a high-ranking Nazi who's just given himself multiple syringes of a serum that grants himself super-strength and near-invulnerability. Ultimately, Corporal Ford is forced to inject himself with the same serum to save Private Boyce (Jovan Adepo) from Wafner, keeping him busy long enough for Boyce to escape and detonate the rest of the C4.

Ford and Wafner are presumably killed in the blast (fire proving to be the only consistent way to kill people infected by the serum) as the castle falls down on top of them. They are buried along with whatever mysterious black ooze the Nazis were harvesting from the Earth for their experiments. No answer is given as to the real nature of the substance, or how it empowered people as it did.

Where That Leaves Us

Boyce escapes the collapsing castle, and reunites with the other survivors of his unit. He speaks to a superior officer and follows a final request from Ford: Don’t tell anyone about the lab. Terrified that the Americans might attempt to replicate the serum, Boyce doesn’t inform his commander about anything supernatural, and insists he only saw a radio room in the base.

The rest of the squad presumably doesn’t reveal the monsters created by the Nazi scientists, either. The film ends with the three soldiers being moved into a different unit to continue as part of the war, despite their hopes that their roles in bringing down the tower would earn them tickets home.

RELATED: Does Overlord Have a Post-Credits Scene?

The events of the film occur right before D-Day, opening on the night of June 5, 1944, and climaxing the morning of June 6. That means the remaining U.S. soldiers -- Boyce, Tibbet (John Magaro) and Rosenfeld (Dominic Applewhite) -- will have another year of combat to survive.

The way Boyce looks at Chloe (Mathilde Ollivier), the French woman who helped to save the paratroopers, suggests that, when everything is said and done, he’ll come looking for her.

Two Bodies, No Answers

There's one thread left unanswered, however. Almost everyone mutated by the lab were either burned to a crisp by the Nazis or killed in the destruction of the base. But there were two bodies (that we know of) changed by experiments. Marie’s Aunt, the first character we see dealing with the aftereffects of the experiments, was shot by the Nazis, and presumably left behind during the battle.

RELATED: JJ Abrams’ Overlord Isn’t a Cloverfield Sequel, But There’s One on the Way

More worrisome is Chase (Iain De Caestecker), the photographer member of the American troop. Shot by Wafner during an escape attempt, Chase dies from his injury. But Boyce brings him back using a stolen syringe of the German formula. It revives Chase, but begins to mutate and corrupt him. His bones jut out of his skin, his spine warps, his body becomes twisted. Even with his head bashed in by Boyce, there might be traces of the serum still be left in his body?

With the military taking command of the town and moving bodies, it's possible that someone might decide to properly examine Chase's corpse. The U.S. government may yet find some trace of the serum. If so, the events of Overlord could repeat themselves.

In theaters now, director Julius Avery's Overlord stars Jovan Adepo, John Magno, Wyatt Russell, Bokeem Woodbine, Pilou Asbaek, Jacob Anderson and Iain De Caestecker.