Continuity mistake: In the beginning of the film when Wardaddy jumps the German officer riding the horse, he is holding him down with his left hand while stabbing him in the gut with his right hand. When the shot changes at the final thrust, he is holding the knife with both hands as he twists the knife to pull it out of his left eye socket. (00:03:15)
Continuity mistake: When Norm takes the picture off the post in the tank near the start, the way he holds it changes between shots from the extreme corner to further down. (00:15:40)
Continuity mistake: When Wardaddy shouts at Norman about "that is a German, that's who we kill", his arm is either bent or straight depending on the shot. (00:17:50)
Continuity mistake: While showing the other tank commanders the unit's objectives on the map with his finger, Lieutenant Parker removes it, but the next shot of him and the tankers shows him still pointing on the map. (00:18:20)
Continuity mistake: We see Sgt Davis standing next to Wardaddy getting the brief on the new mission. In one shot he has his arm raised with a mug in his hand. When the shot changes, his arm is now lowered. (00:18:30)
Continuity mistake: During the Jesus loves Hitler scene, Wardaddy's goggles keep shifting position on his helmet from crooked to level and vice versa. (00:21:50)
Continuity mistake: Wardaddy uses a Sturmgewehr 44 throughout the movie. In the first shot where he shoots the teenage German soldier, the Sturmgewehr 44 is missing the front sight hood. The hood appears throughout the movie afterwards. (00:24:05)
Continuity mistake: When Parker is engulfed in flames, he pulls out his handgun and shoots through the helmet in his right temple. In the next shot, there is neither a bullet hole nor blood stain on his helmet. (00:24:25)
Continuity mistake: Just as the tank column breaks through the hedgerow to rescue the troops, Wardaddy either has his goggles over his eyes or on his helmet depending on the shot. (00:29:10)
Continuity mistake: Wardaddy gives the order to run over the enemy with the tank. We see one German with his right up raised in the rear view of him in the foxhole. In the front shot of him however his arm is lowered. (00:33:10)
Continuity mistake: Wardaddy gives Norman the ultimatum of "him or you." When he does, he's pointing his revolver at Norman. Camera changes and he's no longer pointing at Norm. (00:38:30)
Continuity mistake: Just after Norman has been made to shoot the German, he lies on the floor with his face buried in his arms. Camera cuts and his position has changed and you can now see his face. (00:39:20)
Continuity mistake: When the SS officer is killed for hanging children, his papers land by his head. When the shot changes, his papers are now by his feet. (00:48:30)
Continuity mistake: Wardaddy raises his cigarette lighter to his cigarette twice while he speaks to Norman after the town has been taken. (00:51:30)
Continuity mistake: As Sgt. Collier shaves, Irma is pouring coffee in the kitchen by the sink, facing Collier. The next shot she is standing in front of the stove. (00:58:30)
Continuity mistake: As "Fury" and her crew roll towards the house/aid station, they pass by a gate. The next shot shows the tank still some distance from the gate. (01:23:10)
Continuity mistake: In the final battle scene, day turns to night in a moment. From the inside view of the tank, it is still daylight outside. (01:43:55)
Continuity mistake: As Sgt. Collier is speaking with Lt. Parker, Collier turns his head to the right in the first shot to face Parker, then turns his face right again to face Parker a second time.
Continuity mistake: In the final war scene, when they first run out of ammunition, Grady puts a belt into the coaxial .30, and as he is firing you can see the end of the belt, but in the outer scene when the German is hitting war daddy with a shovel, the coaxial is still firing.
Continuity mistake: Not more than one to two hours after Wardaddy shaves his face clean in the German ladies' apartment, a closeup shot of him in the tank shows beard growth of 2-3 days.
Answer: Gordo was making a point to Norman that the crew of the "Fury" had seen some horrible things during the Battle of the Falaise Pocket. After wiping out an entire German army there, they were tasked with putting wounded horses out of their misery. The point was that Norman was not there, and did not experience what they had, so Norman could not judge the tank crew's actions.
Scott215
Gordo brought up the horse thing because him and the other (original) crew members were not happy with Don and Norman enjoying a nice, quiet meal without them. He even say's "You weren't there" meaning Don sharing this with Norman when he hadn't yet been through much war time like all of them had, together. They also say "We weren't invited", "Why weren't we invited." The horse story was to get at Don for not inviting them and sharing it only with Norman.