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[[caption-width-right:226:''[[{{Tagline}} Deliver them from evil]]''.]]

British [[GenreBusting war horror movie]] made in 2002. It was the directorial debut of Michael J. Bassett, who later went on to direct the movie [[Film/SolomonKane Solomon Kane]].

Set during UsefulNotes/WorldWarI, a group of British soldiers "go over the top" in an assault against German lines. However, in the middle of the battle, a mysterious fog descends upon the battlefield and the night suddenly turns into day. Hours later, they finally stumble upon the German trenches only to find a mere 3 German soldiers, petrified and pointing their guns down their own trenches. The British soldiers call for them to surrender, but the Germans are more scared of something in the trench than them. After murdering two of them and torturing the third, the British troops begin exploring the trench, only to find the bodies of more Germans, seemingly killed by friendly fire. Even stranger, the trenches seem to lead nowhere, simply doubling back on themselves. With a prisoner babbling about demons, impenetrable fog, and a broken radio, they quickly form a defensive position and wait for reinforcements that never come.

Though their radio can't send messages, it can still ''receive'' them. High command seems rather sure that the attack failed and there were no survivors....

Needless to say, things go downhill from there.

!!This movie provides examples of:

%%* ADateWithRosiePalms: All Starinski wanted...
* AnachronismStew: Not very overt, but there are some inconsistencies, especially with the weapons. The Lee-Enfield rifles wielded by the soldiers are WWII-era variants of the rifle (the WWI rifle being harder to come by at this time). But the most obvious example by far is the surprisingly small radio receiver they find and repair. No country had military or civilian radios that small and advanced during WWI. It would fit better in the 1920s. In addition, most of the German rifles are actually WWII-era [=Kar98k=]'s, instead of the Gewehr 98s they should have been using.
%%* AxCrazy: Quinn (Andy Serkis) is about as Axe Crazy as a character can get. The [[CoolGuns/SubmachineGuns Bergmann MP-18]] also makes an appearance. Its correct for the time period, as the SMG started being introduced in small numbers in 1916, but should be using the "snail drum" instead of a stick magazine.
* CaptainSmoothAndSergeantRough: Jennings and Tate fit this, but it's subverted by Tate being somewhat more sympathetic and AFatherToHisMen than Jennings.
%%* CluelessAesop
* DaylightHorror: Most of the movie, but the night scenes are almost equally long as the day ones and the daylight itself is consistently gloomy.
* EldritchLocation: Wherever the squad have gone, it's taken a match to the rule book of physics and flips off such a thing as night and day, changing from one to the other and back unpredictably and quickly.
%%* DeathBySex: [[spoiler: Starinski, almost. But only with himself.]]
* FogOfDoom: Hey, it's UsefulNotes/WorldWarI. Fog of Doom is already all over the damn place.
* {{Foreshadowing}}: Connected to the FogOfDoom above. [[spoiler:The protagonists were fighting off the Germans from their trench in the middle of the night, but got knocked out and awoke in a somewhat different location, surrounded completely by thick fog. And the night suddenly changed to ''[[FridgeHorror day time]]''.]] One or two of the characters even [[LampshadeHanging lampshade]] the unusualness of this.
%%* GainaxEnding
%%* GenreBlindness: Both played straight and averted.
* KarmicDeath: [[spoiler: Most of the cast, who are each shown to be morally flawed (or just unlucky) in some way, are shown to get their comeuppance in various gruesome ways. Especially Quinn. *shudder*]]
* LastNameBasis: A subversion, since in the script and credits, the characters are mentioned by their full names. But the only personal name used on screen regularly is Charlie's.
* LetsSplitUpGang: Despite blowing up the approaches to their trench to limit the space they have to defend, the squad never seem to be within sight, earshot, or running distance of each other when anything happens, and stationary, presumably vulnerable characters like Chevasse and the prisoner go unguarded and unmentioned for long stretches of the film. Unsurprisingly, this results in a DwindlingParty.
* MaybeMagicMaybeMundane: [[spoiler:The whole haunting and supernatural phenomenna going on in the abandoned trench. Including ''living barbed-wire''.]]
* MercyKill: Charlie does this to Chevasse [[spoiler:after he discovers rats are eating his legs]].
* NothingIsScarier: The earlier portions of the movie, before the squad members start getting killed off in mysterious ways by unknown forces or themselves under suspicious coincidences.
* OfficerAndAGentleman: Averted by Jennings and Tate, both of them enormous {{JerkAss}}es. This trope is also [[DoubleSubversion double subverted]] by Tate, since he's oficially [[SergeantRock a sergeant]] and acts pretty jerky, but shows some signs of being a JerkWithAHeartOfGold.
%%* OnlySaneMan: [[KidHero Charlie]] and, to a questionable extent, private Chevasse and doc Fairweather.
%%* OurGhostsAreDifferent
%%* PsychoPartyMember: Overtly Quinn, and later [[spoiler: Bradford]].
* PsychoticSmirk: Quinn most of the time. [[spoiler:By the end of the movie, Bradford has an even creepier smile on his face when threatening Charlie.]]
%%* TheReveal: [[spoiler:The German soldier at the end.]]
* SanitySlippage: All the characters [[TemptingFate after they enter the creepy abandoned trench]] and [[WhatAnIdiot decide to hold it]] [[GenreBlindness until backup arrives]].
* SecretTestOfCharacter: Charlie's persistent and mounting refusal to kill anyone seems to be what separates him from his squadmates [[spoiler:until he does, is apparently sucked into the underworld, escapes, is then held at gunpoint by the prisoner, and is released... BecauseYouWereNiceToMe.]]
* SinisterMinister: [[spoiler: [[NotSoHarmlessVillain Bradford]] ]] slowly morphs into this because of his gradual SanitySlippage. [[spoiler:He was quite TheFundamentalist before as well, just not insane yet.]]
* SlidingScaleOfIdealismVersusCynicism: Unabashedly cynical in it's portrayal of TheSquad, whose members are mostly [[HumansAreBastards bastards]] at best and [[AxCrazy violent]] [[SociopathicSoldier psychos]] at worst. Needless to say, the image of the [[IronWoobie tragic]] [[StiffUpperLip yet cheerful]] "Tommies" seen in British UsefulNotes/WorldWarI propaganda [[{{Deconstruction}} gets completely shattered]]...
* SociopathicSoldier: Quinn.
-->"Thank god he's on our side, eh?"
** How about this exchange ?
-->Quinn: "I went to Blackpool once..."
-->Starinski: "Oh, was it nice ?"
-->Quinn: "I killed a man there... Yeah, it was nice."
* TheSquad:
** NewMeat[=/=]TheHero: private Charlie [[NamedAfterSomebodyFamous Shakespeare]]
%%** SergeantRock: sergeant Tate
%%** UpperClassTwit: Captain Jennings. Particularly [[{{Narm}} narmy]] when he definitely [[GoMadFromTheIsolation goes off his nut]].
%%** TheEngineer[=/=][[spoiler: TheFundamentalist[=/=]BewareTheNiceOnes]]: [[CanadaEh private Bradford]]
%%** PsychoForHire: private Quinn
%%** ColdSniper: private Starinski
%%** TheMedic[=/=]MauveShirt: Doc Fairweather
%%** RedShirt[=/=]SacrificialLamb: private Chevasse
%%* WarIsHell: Oh yes. By miles.
%%* WorldOfHam: All of the soldiers, with the possible exception of the German.