When the agent in the alley takes his cyanide pill and kills himself, Diana and Steve seem oblivious to the fact that there are 5 other agents still alive and unconscious in the alley, that they could get information from. They simply walk away, leaving the information these agents have undiscovered, and a bunch of German agents in the alleyway to go on their merry way once they wake up.
When the party lands in Belgium, one can see a river boat named after Édith Piaf, who was only 3 years old and had not started her singing career.
The song sung by Charlie in the village cafe, "I'll Walk Beside You," was written in 1939.
Steve Trevor spots a motorcycle to make a getaway on. The bike shown is a period-correct machine, probably a Douglas or a Triumph, with a drive belt made from leather links. The scene cuts to him riding through a forest on a much faster, much more modern machine with telescopic suspension forks - which weren't invented until 1935 by BMW for the R12.
In any pre-industrial society, ceramic jars would be much too valuable for mere target practice when you could just as well use much cheaper items like bales of hay or straw. However, they might well be cracked, contaminated, or otherwise unusable.
When Diana crosses no man's land, the rate of fire of the German machine guns is much too high. The standard 08/15 Spandau MG would fire about half that many rounds per minute, just like the one in the armored car she flips a few minutes later.
When Diana is racing away from the gala on a horse back to the village, the blue dress she was wearing flies off, leaving her in her Wonder Woman costume. However, if she had been wearing her costume under the dress at the gala, it would've easily been seen peeking out the top of the dress, since the dress is much lower cut across her chest than her costume is.
In the french village scene, you can see modern vehicles in the background.
When Steve gets dressed after his bath, we hear the sound of a zip. During WWI the zipper was a new invention and only being used in American uniforms, not in other nations uniforms or civilian clothes, and Steve is an American serving in British intelligence.
When Dr Maru and Ludendorff are taking in Dr Maru's lab, there is an Avometer on the bench in the background. This film is based during the end of the first world war (1918). The Avometer was not invented until 1923.
When Steve is telling the Amazons about the Germans having Turks build bombs for them, the facility shown has two Ottoman flags that feature a white crescent moon and a white star on red. Those flags belong to present-day Turkey. The Ottoman/Turkish flag used between 1844 and 1936 was very similar, but had a visibly thicker moon and a plumper star on it. Since the movie is set in 1918, the Ottoman Empire would still be using that flag.
At one point a map is shown (1:22). They locate the 'fictitious' village of Veld near the city of Hazebrouck. That's a city in the North Of France. So, not Belgium as the plot suggests. Then you hear some locals comment on Wonder Woman's destruction of the church tower. They do it in Flemish, but not with a West-Flemish accent (as spoken by some at the time in Hazebrouck).
on 01:23:23 the "Ottoman" texts has nothing to do with the gases and stuff. They are just words that make no sense together. And the drawings between words are meaningless. Some words are: (in Ottoman) "Animals, situations, right, dog, human, hundred, me, there is, feelings"
In Turkish, the texts read "Hayvanlar bildigi hallerini dogru..."
When Diana and Steve are sailing to London, they both fall asleep near Turkey (where Steve's plane was shot down) and wake up, seemingly the next morning, in London. Not only would an un-helmed sailboat almost immediately drift off course, a sailboat trip from the Eastern Mediterranean to London would take several weeks. [Arriving in London, Steve says "We caught a ride." The boat is tied to a steamer and is being towed. There is no reference in the movie as to the location of the Amazon Island. In the comics it is in the Atlantic.]
While the song that plays in the cafe in Belgium ("Sous Les Ponts De Paris" or "Under the Bridges of Paris") was written in 1913 and therefore period-appropriate for WWI, the recording is by French singer Lucienne Delyle, who was born in 1913 and didn't record the song until 1950.
By November 1918, the war had become very mobile, and while elaborate fixed defenses still existed, "No Man's Land" was still a shell-blasted wilderness; the Allied troops' greatest problem was dealing with the Germans who dug new trenches every evening.
The film repeats the common thought that British General officers stayed far behind the lines and were callous regarding the deaths of their men. In fact 78 British Generals were killed in action in World War I. British Generals above Division command did stay behind the lines.
Cyanide pills weren't used until WWII.
The Fokker Eindecker monoplane Steve Trever used to escape the Germans was only used very early in the war,it was the first plane to shoot the machine gun between the propeller blades using an interrupter gear. They were obsolete and out of service 2 years before the U.S. entered the war..
In the final battle, when Diana is fighting Ares, there is a Mark V Tank, and then later one is picked up by Diana. The Mark V is a British design and is unusual to be found in a German staging area. However, this is military research facility and it is quite possible that the Germans have captured British tanks for research purposes and developing more effective weapons against it.
In the credits, the word "Cavalry" (horse-bound soldiers) is spelled "Calvary" (Latin word for skull, name of the hill of crucifixions). Big difference in meaning, but a common spelling error.
Maru's book should have been damaged severely from being under water, despite it being in a leather pouch, but Steve hands it to Darnell in pristine condition.
In the initial battle with the Germans on the beach all of the Amazons are on top of a cliff, from which they are easily able to reach and kill many Germans who are still in their boats. Yet they give up the high ground from which they can safely and easily pick off the Germans. They then engage in hand to hand combat on the ground with enemies who clearly have superior weapons. For a group of warriors who have spent their whole lives training and fighting they would know that giving up their strategic advantage would be foolish and put many of their lives at risk. It could be reasoned that they gave up the high ground because Diana was down on the beach, alone with a stranger. They knew Diana's secret and protecting her would have been their priority, not their own safety.
The railway carriage (US "railroad car") at the port in 1918 is named "Southern Railway". The Southern Railway did not come into existence until 1 January 1923.
Steve Trevor and Etta Candy use the word "intel" instead of "intelligence". Merriam-Webster says "intel" didn't enter the English language until the 1960's.
The movie takes many liberties with Erich Ludendorff's biography, from murdering his superiors with chemical weapons to his death date. However these are deliberate products of a plot that diverges significantly from real-life history in many other respects. They are not goofs.
At the airfield in the final battle the background shows 3rd generation (1980s) hardened aircraft shelters.
Steve's watch falling into the ocean at the end of the movie shows a closeup of the dial with the second hand ticking, instead of sweeping. Ticking second hands only came into existence with the invention of quartz movements in watches in the 1970's.
When Diana is dancing at the gala with the sword in the back of her blue dress, the hilt of the fake sword leans far to the right when Steve is with her, showing that there is no sword at all, just the hilt.
After liberating the town of Veld, Diana and Steve are seated in the town square with mugs of beer. Diana has a beer in her left hand and sets it on the fountain. When Steve stands to ask her to dance, she is holding the beer in her right hand and sets it down again.
When Steve runs after Diana as she flees from the gala, he is not wearing his hat. When he emerges from the building, he is wearing it.
There is no blood on Diana's sword after she kills Ludendorff.
In the climatic battle when Ares escapes from the Lasso of Hestia and throws Diana away with a blast, she falls on the ground with the lasso folded and fastened on her belt.
When the Germans attack Themyscira early in the film, they are in small boats launched from a larger boat, maybe a cruiser or destroyer, that has penetrated the island's protection. As the Germans and Amazons fight, the larger ship is shown to be listing further and further, to the point of capsizing. This would explain why it is never seen again.
In the trenches Steve says the battalion has been there a year. British battalions were put forward into the front trenches for a few days at a time then sent to the rear for recovery and rest. By the end of the War in 1918, the fighting is much more mobile. In German advances around April 1918 (Spring Offensive) British and French positions were pushed back several miles. And after July the Allies, reinforced with US troops and using improved tactics and tanks, have been advancing miles at a time in what is known as the "Hundred Days Offensive".
When Diana is using an iPad and typing on a BlueTooth keyboard, a virtual keyboard is visible on the screen. In reality, when such a keyboard is connected, the virtual keyboard is automatically hidden.
During the feast in the ruined Belgian village, a chanson sung by Edith Piaf is heard playing on a gramophone. Piaf would have been only three years old in 1918.
The glass plate photograph is not a negative image.
When Diana and Steve are having a meeting with the generals and it is discovered Diana can read Dr. Poison's book of formulas, there is a shot where Diana is missing a button on her overcoat. In the very next shot, it is back on but askew, and in the shot after that it is back in alignment with the other buttons.
After they save the town of Veld, 'Sammy' brings beers to Diana and Steve - he walks off with a glass still on the tray, and despite the fact that he tilts the tray, the mug doesn't move, and the liquid in the glass doesn't move.
Aside from the fact that it has no telephone poles (at least the part of it that was liberated), it would have been impossible for Steve to telephone Morgan from Veld. Although the Post Office exchange in London had opened telephone service with Belgium in 1903, telephone service did not reach small towns and villages such as Veld until much later. In real life, Steve or a member of his team would have had to have traveled west to Olsene or north to Deinze to send Morgan a telegram.
Wonder Woman's armoured boots have wedge heels in close ups and in peaceful scenes, but are flat during fights and stunts. This is especially obvious during the start of the occupied town fight: There are some close ups of her obviously high heeled boots deflecting bullets, immediately followed by slow motion scenes of her flipping and jumping in flat soled boots.
Briefly during the first London rail terminus scene, overhead wire gantries can be seen in the background of a type that were not in use until the 1950s on-wards.
Diana at age 8 speaks in a Scottish accent which changes to an English accent to almost no accent to a "Themysciran" accent.
The aeroplane in which Steve Trevor escapes from Ludendorff's base is white when he steals it in the flashback, but red in his first scene when he crashed it into the ocean off of Themyscira.
Throughout the movie, Diana's wristbands appear/disappear without any explanation.
While standing outside Cafe Buvette, Diana and Steve go from no cold breath to cold breath (where it looks like steam), to no cold breath again.
During the battle scenes, Diana's hair goes from messy to perfectly curly and neat. This occurs multiple times during fight scenes.
When Steve and Diane are in London, they are faced with gun-wielding robbers in an alley, the first thing seen is a revolver pointed at them with the hammer fully cocked back, in the immediate next scene with the robber holding the gun, the hammer is not cocked, the robber then cocks it back.
The English subtitle during their multi-lingual "smack-down" has Sammy "say" to Diana in Mandarin: "I know Chinese, too, tricky girl". Chinese is not a language. However, that might be a mistake by the character.
Steve gives the Amazons his serial number as "8141921". The Army began to issue service (or serial) numbers in February 1918 to its enlisted personnel. Service numbers were not issued by the Army to its officers until 1920. Steve, a captain in the Army's American Expeditionary Forces, would not only not have such a ridiculously-high service number, he would not have a service number at all.
After walking through the mud, Diana's boots are spotless.
General Erich Ludendorff was head of the German Imperial General Staff. It was he, not von Hindenberg, who in the Fall of 1918 advised the Kaiser to accept the armistice as the German army could not stop the combined Anglo-American army from taking Berlin. The reason for this mistake was probably that the producers thought Hindenberg's name would be more recognizable to the 21st Century movie goer than Ludendorff. At the end of WWI, Hindenberg was still a field commander.
In Batman v Superman: Dawn of Justice, in the photo of Diana and the team, she is seen wearing her shoulder strap on her right side. However, in this movie, when the photo is taken, she is wearing it on her left side.
The village of Veld is allegedly a French village (the name of the town Hazebrouck is on the map and information on buildings are all in French). However on the awning of the bar, there is the word "bier" which is in Flemish or German. In French, it should be "bière". However, this might be correct, as Hazebrouck is in French-Flanders, where a lot of people used a dialect of Flemish at that time.
Searchlights were used in World War I to create "artificial moonlight" to enhance opportunities for night attacks by reflecting beams off of clouds. The searchlights at the camp Diana and her friends infiltrate all-but advertise the Germans' presence to the enemy.
It was not snowing when the old man took a photograph of the heroes after the battle in Veld. The photo Bruce Wayne sends to Diana seems to show snow falling, but this is not a goof ; the white flecks in the image are imperfections of the camera and printing process. In any case, the exposure time of a photograph in that era ( without flash ) would be so long, that even if it were snowing, no snowflakes would be caught on the film.
When Diana questions Hippolyta about where the god-killer weapon is kept, tan lines from sunglasses are visible on Hippolyta's face.
During the trench scene where Diana is arguing with Steve about rescuing the citizens of Veld, there is a soldier on the ladder behind her (looking across No Man's Land). The shot momentarily changes to Steve and back to Diana, at which point the soldier vanishes.
During the gala, Steve's not wearing a hat. He wears one when leaving the castle for about ten seconds and goes to the forest with Diana with it missing for the rest of the film.
World War I ended in 1918. Diana was perhaps 20 at the time. She later worked at the Louvre, some time after the pyramid was built in 1989. That's over 70 years, making her at least 90 when she worked there. She looks pretty good for a nonagenarian. (She obviously aged while on the island.)
Diana Prince is an immortal Amazon princess and thus would not be subject to the normal rigors of aging. The time frame of her childhood and upbringing are deliberately obscure. She may be hundreds of years old at the time of these events.
The license plate of the Wayne Enterprises armored van "JL-828-VZM" (shown in the Paris located opening sequence) is wrong. In the current French license plates format, there are only two characters in the last group.
As in many Hollywood movies, the German spoken parts on the battle field and in the small towns are gibberish and make absolutely no sense. It is also fascinating to see that the German high command hosts a huge ball but not one character speaks German, instead everyone speaks English with a mock German accent. However, movies with a foreign language and subtitles are harder to follow, so this may be permitted as artistic licence.
Diana speaks English to Steve before she knows what language he speaks.
When Diana rescues Steve Trevor from drowning, the characters can be seen exhaling air on the way to the surface. Only reason to do that, is if they had been breathing from a tank of pressurized air while being underwater.