When the troop first arrives at Chukoti, the British (Union) flag is flying upside down - long before the fort was in distress.
The Union Flag colors being carried by the lancers as they are about to go into "the valley of death" is flying upside down. In all the subsequent shots the flag is the correct way up.
In the forged order, Vickers writes: "Upon receipt of this order, you will advance the Light Brigade and take enemy position on Balaklava Heights." When his superior officer reads it aloud, he says: "Upon receipt of this order, the Light Brigade will advance and take the enemy position on Balaklava Heights."
When Vickers jumps off the ledge onto an attacker, the ground changes from sunny to shaded between shots.
At the ball when Lady Octavia is introduced to Lady Pelham, she bows and says good evening. However, in the next cut, she repeats the bow and quietly says good evening.
When Captain Randall sneaks out to go to the river he is wearing the rank of a first lieutenant (two diamonds) not a captain (three diamonds).
At the beginning of the films during the credits, there is a plaque with the Latin phrase, Quis Superabit. However the correct Latin spelling is Quis Separabit.
After the massacre, Flynn sympathetically listens to Major Singh crying over the body of his murdered son Prema who is clearly wiggling his toes in the foreground of the scene.
When Randall is preparing to go over the wall to Lahara, a lighting effect is used to suggest clouds passing in front of the moon, so the amount of light varies. However, the effect is interrupted as Randall puts on his hat.
When Geoffrey and his command are 60 miles from Batum, they are ambushed by local tribesmen. The camera gives a close up of one of these tribesmen firing his flintlock. But the frizzen is forward, rendering it inoperable. The frizzen needs to be back (and over the black powder filled pan) in order for the cock (with its flint) to strike it, create sparks, and rain those sparks down on the black powder in the pan (as the cock also pushes the frizzen forward thereby exposing the black powder in the pan). When the sparks fall on the black powder, they ignite the black powder, which flashes, through the touchhole into the chamber of the flintlock, which in turn ignites the main charge, and sends the ball on its way out of the mussel of the flintlock toward its target. But if the frizzen is forward, there is nothing for the flint in the cock to strike, and ultimately set off the main charge. Therefore, with its frizzen forward, a flintlock is inoperable, meaning this weapon could not and did not actually fire.
During the charge scene, one of the falling brigade riders falls from his horse. His lance bends instead of breaking when impact occurs with the ground.
During the first battle scene when one of the tribesmen is shot; he falls off the hill and you hear the iconic Wilhelm scream.
Throughout the film, Errol Flynn is wearing his wedding ring even though his character is unmarried.
In the first ambush scene, some individuals on both sides were armed with single shot Sharps Carbines, which were American made and didn't exist at that time.
During the charge there is at least one scene of the charge from the heights, with a Russian flag visible. It is the plain tricolor (white, blue, red), however flags used by the Russian Army for a long period including during the Crimean War would have been regimental flags with the Double-Headed Eagle - the official Imperial symbol - in the center.
In the battle of Chukoti, many defenders are using breach loaders prior to their popular usage.
Many of the weapons used in this movie are 1873 Springfield rifles and 1873 Springfield carbines (a viewer earlier misidentified the 1873 carbine as a Sharps carbine). As the Battle of Balaclava took place in 1854, these weapons are 19 years too soon. But Hollywood studios routinely used these weapons to reenact Civil War battles (such as The Red Badge Of Courage) as they were so many of them so readily available to the studios through the 1960s.
The trip wires that kill the horses are totally visible during the charge. This occurs multiple times during the action sequence.
A single shot kills Randall. How is it that this was not heard by anyone, or reported to Vickers or the Colonel?