There is a smaller terrier dog as they are walking through the starting trenches which is fine and doesn't come into the movie again. The corpse of a larger pit bull looking dog is seen covered in mud as they approach the farm house. It isn't shown again but is mentioned as they drive away when one of the soldiers asks "is that a dead dog?"

Dead horse and cow corpses are seen but they are killed off screen

you see dead animals and there is discussion of soldiers mowing down cows for no reason.

Mainly the flies on the dead horses.

While the 2 protagnists of the story climb up to see the battleground early in the movie, there are a couple of dead horses. The camera get’s quite close on the horses and you can see flies fly away from the horses.

A drunken German soldier goes outside to vomit before returning indoors to his bottle of liquor.

era-typical cigarette use (a lot)

You can see a corpse at some point that doesn't have an eye but its just for a couple seconds as a character passes over it

Not on purpose but one of the protagonists cuts his hand on some barbed wire and the may be more cuts happening throughout the movie that arent on purpose

Nothing on screen, but It’s ww1, so there must be at least someone with broken or missing teeth.

Someone impales their hand on barb wire.

not as the singular focus of a scene, but a scene late in the movie in a medical tent shows some glimpses of severed limbs which includes broken bones.

The crashed pilot is on fire, he doesn’t’ die of the fires, but *spoiler* get’s killed by the protagonist.

no small children die, but many of the soldiers are clearly young men and are in peril most of the movie. there are a lot of distressed, injured, and dead soldiers throughout the movie.

Offscreen. A we meet a young woman who is tending to a baby whose mother has presumably died in a besieged town.

when the characters are in the bunker and a rat falls onto the ground, something very loud and unexpected happens shortly after. a few other similar scenes occur. no "horror jumpscares," just lots of loud/unexpected blasts because it is a war movie.

People were spitting in the trenches from time to time.

in the besieged town, when the character sneaks out in the early morning, you see a german soldier stumble out of a building, drunk. he leans over and vomits. it's at a distance, but you can see and hear it.

At the end of the movie you can see a fe hospics working in a hospital tent. The injuries shown are severe and graphic.

A commanding officer (captain???) has an anxiety attack and is unable to respond just before he and his men go into battle.

In the hospital scene multiple people have severe injuries, also a few other instances.

no, but a character warns another character that they should have witnesses for an important errand they're running, implying someone else may try to change the narrative if that character gets in their way. the story doesn't dwell on this at all.

some of the underground bunker and trench scenes might feel claustrophobic.

Although a lot of the movie is shot on steadycam, there are a couple scenes shot with the handheld technique.

Not really strobe effects, but repeated bright flashes of light in a nighttime scene.

There is the use of the word ‘f*g’ in reference to cigarettes.

rest in power thomas blake 1898-1917

a british soldier makes a joke about how an indian soldier can barely speak english, but none of the other soldiers receive this well and one suggests that the indian guy speaks better english than he does.

Debatable. The mission is completed (though some of the men have already died) but the war goes on.

It’s a war movie, so expect a lot of injuries. Although not as overwhelming gory as movies like Saving Private Ryan.

No one fall to their death on screen. At some point a protagonist does stumble upon some corpses floating at the edge of the water after he falls down a waterfal. It is unknown whether all those people drowned, fell to their death, were shot, fell into the water and ended up there etc.

there is a prolonged scene involving a character being dragged down a river, frequently getting pulled underwater, and eventually dropping down a waterfall. he survives, but he is clearly choking on water the entire time. he later comes across several dead bodies in the river. it's unclear if they died from drowning but they are bloated from being in the river.

No, just normal explosions. Nuclear weapons haven't been invented by that point.

As a tunnel is collapsing, one of the protagonists gets buried under the rubble momentarily before being found and rescued.

There’s a scene involving 3 fighter planes, one of them crashes down, this is a tense scene.

It’s a war movie.

in an early scene, a character is buried in debris and when he surfaces, he's clearly struggling to breathe from the dust. lots of wheezing and asthma-breathing sounds. in another scene, a character struggles to breathe while being swept down a river, but he survives. in another scene, a character chokes an enemy soldier.