Skipper, a WWII Corsair, from Planes is this, having lost his entire squadron on their first mission. It traumatized him so badly, that he cannot even bring himself to fly any more, which is pretty significant considering he's a plane.
In Act of Violence, both Frank and Joe arent integrating back into civilian life that well. Frank is able to keep up a happy façade, but eventually breaks down when the memories of his POW life haunt him. On the other hand, Joe could never possibly assimilate until he accomplishes his insane idea of murdering Frank.
Spoofed in Airplane!, where the protagonist is a shell-shocked fighter pilot who ends up having to fly a jet airliner.
This was taken directly from Zero Hour!, from which Airplane! was adapted.
Airplane II: The Sequel—"I lost my squadron." "Over Macho Grande?" "No. I don't think I'll ever get over Macho Grande."
Parodied in Anger Management with a Shell-Shocked Veteran...who fought in the Grenada Invasion, which lasted less than two months with very few casualties.
Colonel Kurtz is technically still at war in Apocalypse Now, but boy has the cheese slid off his cracker.
Also Captain Willard, who is already quite messed up when the film begins and we can only imagine what goes on in his head by the end. Lance eventually shows this as well.
The three protagonists of The Best Years of Our Lives, returning home from WWII. Al can no longer relate to his wife or his children who grew up without him, and is turning into an alcoholic. Fred, a retired bomber pilot, finds himself having Bad Dreams wherein he relives dramatic war scenes. Homer lost his hands in the war and is now ashamed of his artificial hooks which makes him feeling uncomfortable around his family or his girl-next-door sweetheart.
Walter Sobchak in The Big Lebowski. Possibly subverted, as a cut scene reveals he was never in Nam.
Black Dynamite in Black Dynamite speaks about his past and a his story about a dead Viet Cong child.
Roy Scheider's character Frank Murphy in Blue Thunder is a Vietnam veteran who suffers occasional flashbacks of an NVA soldier falling out of a helicopter that he was piloting. This turns out to be plot-significant, as his nemesis, Colonel Cochrane, is the one who threw the soldier out. The Epiphany Therapy following this realization allows him to defeat Cochrane.
Played for laughs in Cheech & Chong's Up In Smoke when Pedro de Pacas (Cheech Marin) takes Man (Tommy Chong) to meet his cousin Strawberry (Tom Skerritt), the comedic epitome of this trope. Hilarity Ensues.
Frankie Dunlan in Combat Shock is a Vietnam veteran who has flashbacks of being ambushed by an NVA squad and being tortured as a POW.
In The Englishman Who Went Up a Hill But Came Down a Mountain, Hugh Grant plays a cartographer visiting the small and idyllic Welsh village of Ffynnon Garw. Many people there go by their nicknames alone: for example Thomos Twp and Thomas Twp Two, a pair of brothers with mental disabilities; Thommy Twostroke who fixes motor engines; Evans the End of the World; and poor Johnny (Shellshocked) Jones, normally referred to as Johnny Shellshocked. A good portion of the film dedicates itself to his difficult recovery from the War to End All Wars, as he overcomes his terror of large hills, starts talking again and joins the rest of the town in climbing it.
In The Final, Parker is a Vietnam vet who is haunted by he experiences in the war. He eventually reveals to Kurtis that he believes he won his medals for cowardice: he hid while the rest of his unit got wiped out, making him the sole survivor.
Godzilla (1954) gives us Daisuke Serizawa, a brilliant but quiet scientist who wears a eyepatch. The reason he does so is because he's fought in World War II. The end result is losing his left eye and a horrible scar. And as the creator of the Oxygen Destroyer, he makes it clear he did not want to use it as a weapon, but the titular monster utterly destroys his hometown of Tokyo, forcing him to change his mind and use it against Godzilla.
Senior Chief Randall in The Guardian wasn't in a war, unless you count the constant battle against the elements, but he still has flashbacks to one mission in particular in which he was the Sole Survivor.
Tydeus in Hercules (2014) is an extreme example. His war experiences left him unable to speak, but Hercules tells us he relives them every night.
Spoofed again in Hot Shots! with Tug Benson (Lloyd Bridges). At a soldier's funeral, he mistakes the 21-gun salute for an enemy attack... and responds in kind. Also, every possible part of him is a replacement to a war loss (exception: "My skin's made of asbestos. Tanning parlor accident at Dien Bien Phu.").
Let There Be Light is a 1946 U.S. Army documentary film by John Huston showing the therapy given to traumatized veterans returning from overseas. Although the film is actually quite optimistic, with all the soldiers fully recovered after an eight-week stay, the portrayal of deeply damaged veterans so displeased the Army that it shelved the movie. The film wasn't made available until 1980.
In Iron Man 3, Tony Stark is traumatized by the events of The Avengers — where he not only spent hours fighting an alien horde, but nearly died destroying their mothership. As a result, he barely sleeps, has nightmares when he does, and has panic attacks every time someone asks about "the battle of New York."
Agent K from Men in Black. In the third movie, we find out this isn't because of his career fighting aliens, but because he saw Agent J's father die and had to comfort J, who at the time was just a little boy named James looking for his father. And this was after he had met grown-up J, who had time-traveled from the future, and realized that he was talking to his future colleague.
Parodiednote PTSD is a very serious subject, so YMMV on whether or not this is an appropriate subject to make fun of. in Not Another Teen Movie, with Randy Quaid's character. Doubles as a Casting Gag: Quaid played a shell-shocked Vietnam Vet in the 80s teen film The Wild Life.
Addressed briefly in Patton, when the title general lambasts a traumatized soldier for what was then called "Battle Fatigue" but which Patton calls cowardice.
Rambo was a POW in Vietnam and was tortured thoroughly. In a scene in First Blood, cops have him locked down in the cell block and torture him with a firehose before restraining him to try shaving him. Rambo has a flashback to getting partially flayed in Vietnam and freaks out, beating his tormentors and escaping.
Major Randolph Doryan, the commander of the British Army base near Kirrary in Ryan's Daughter, is a shell-shocked veteran of the trenches in World War I; in one scene, village idiot Michael is absently tapping his leg on a pub bench, and the noise causes Doryan to flash back to his war experiences and temporarily go into a catatonic state.
As summed up by world & war-weary Kambei in The Seven Samurai after the good guys have won at the cost of the lives of four of the seven comrades: So. Again we are defeated. The farmers have won. Not us.
In Stalag 17, Joey suffers from this and for much of the movie has a blank look on his face, Only when he is playing his ocarina and watching the mole get his well-deserved fate does he smile.
Stop Loss is considered a Spiritual Successor to The Best Years of Our Lives, highlighting the troubles of returning Iraq War soldiers. One character in particular is an alcoholic who can't relate to his wife, and she opts to just slap him with a restraining order rather than deal with him. The protagonist also has hallucinations and nightmares over all the people he's killed.
In The Substitute, Shale clearly has some hangups about Vietnam and uses his experiences to discipline students. "You had to be resourceful in Vietnam!" - Said after injuring a student with a soda can.
Asshole Victim Harry March in Sweet Country is a veteran of the Boer War, and is hinted to have PTSD which contributes to his alcoholism and erratic behaviour.
In the first movie, Kyle Reese fits this trope, having come from a post-apocalyptic Bad Future where a brutal Robot War rages between killer machines and the few human survivors. He even gets a flashback to fighting in the war from a crane in a construction site.
Trench 11: Berton is a Tunnel King during World War I who survives a tunnel collapse, digging himself out after he was thought to be dead. He becomes The Alcoholic and has to be pulled from a bar by military police and pressed back into service against his will for a mission that needs his expertise.
The character Parker in Troma's War, who seems to be a spoof of director Oliver Stone(apparently an old friend of the film's director Lloyd Kaufman).
Paddy as well. If his drunken ramblings are historically accurate, he was reliving his closest friends and coworkers heading toward certain doom courtesy of a dumbass leader.
One of the news segments in WNUF Halloween Special is about a shellshocked Vietnam veteran, who shot a kid whom he mistook for a Vietcong insurgent when he appeared on his door for trick or treat.
The film Windtalkers begins by showing Sgt. Joe Enders fighting the Imperial Japanese Army in WW2, which also shows events that leads to him being shell-shocked; events that would play a major role in developing his character throughout the film and how events proceeds.
Charlie, the team's Friendly Sniper in Wonder Woman (2017), has been officially discharged, but Steve convinces him to return for One Last Job. When liberating Veld, the team comes under fire from a sniper in a bell tower. Charlie takes aim... and has a nervous breakdown. At another point, he wakes up screaming "Don't go in there!" He suggests he go home, but Diane (having even less concept of PTSD than anyone around her) suggests he stay, because they wouldn't have anyone to sing for them (Steve mentions he hadn't heard Charlie sing in years).
Exaggerated in X-Men Origins: Wolverine, in a bedroom exchange between a traumatized Logan (whose healing powers make him well over a hundred years old) and his lover Silver Fox.
Silver Fox: Was it the war? Logan: Yes. Silver Fox: Which one? Logan: All of them.note Logan was seen fighting in the American Civil War, World War One, World War Two, the Vietnam War, and various black-ops missions. And there are a whole lot more wars he could have participated in
You Were Never Really Here: Joe is a severely traumatized man who has frequent flashbacks to his time overseas. One particular moment that haunts him is giving a local boy a candy bar and then watching that boy get murdered over the candy bar only moments later.