[[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/WorldWarOne, 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. The Lee-Enfield rifles wielded by the soldiers are a later, WWII-era version of the model (the WWI version being harder to come by). 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.
** Regards the SMLE, the UsefulNotes/WW1 version (the No.1 MkIII or MkIII*) is not difficult to come by at all: the Australians went on making them until after World War 2.
* AxCrazy[=/=]BloodKnight: Quinn (Andy Serkis) is about as Axe Crazy as a character can get.
* 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.
* DeathBySex: [[spoiler: Starinski, almost. But only with himself.]]
* DoNotDoThisCoolThing: Averted, even though it's not a war movie in the traditional sense.
* FogOfDoom: Hey, it's UsefulNotes/WorldWarOne. 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.
* [[spoiler: 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]].
* NotEvenBotheringWithTheAccent[=/=]WhatTheHellIsThatAccent: Is Bradford supposed to be Canadian or British ?
* 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.
* [[spoiler:OurGhostsAreDifferent]]
* PsychologicalHorror[=/=]SurrealHorror: It's implied that, [[spoiler: rather than 'crazy unexplained barbed-wire magic', [[YourMindMakesitReal the cause of the company's fate may have been collective madness]] - wandering into a maze-like trench filled with dead Germans without contact from your superiors for weeks is bound to do this kind of thing to you.]]
** Or to give the writer a little more credit:[[spoiler: They all died in the initial attack, the trench is a form of Purgatory, and the German is an angel[=/=]demon who's purpose is to test the morality of their characters. Those that fail die and stay in the trench, those that succeed get to leave it. Notice that this makes a lot more sense, given what's mentioned in the Foreshadowing entry.]]
* 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/WorldWarOne 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[=/=]TheNeidermeyer: 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
** UsefulNotes/{{Scotland}}: private [=McNess=], token stereotypical Black Watch (Highland Regiment) soldier.
** RedShirt[=/=]SacrificialLamb: private Chevasse
* [[RiverOfInsanity Trench Of Insanity]]
* WarIsHell: Oh yes. By miles.
** And if you accept the purgatory interpretation, HellIsWar.
* WorldOfHam: All of the soldiers, with the possible exception of the German.
* UsefulNotes/WorldWarOne: The setting is the western front, presumably in the later stages of the war (cca 1917). And it's as muddy and [[{{Mordor}} grim]] as ever...