Continuity mistake: In the scene where John Basilone goes looking for his friend Manny. Basilone has 3rd degree burns on his left forearm and left hand but in the shot he is walking through the jungle holding a pistol tightly in his left hand and his canteen is on his right side as he walks past a group of trees. The next shot he is continuing walking through the jungle but the gun is in his right hand (which isn't burned) and his canteen has also switched sides as he walks past the same group of trees.
Continuity mistake: The Pacific Complete Series, Episode 6: A soldier kneels down next to a covered dead soldier's body to check his bottle of water. When uncovering the body, the face of the dead soldier faces to the right. In the next shot, the face is to the left, and then before being covered again the face goes back to its original position of facing to the right. 10m:30s to 11m:10s.
Continuity mistake: In Episode 4, after a Japanese counter attack, Leckie is talking to two other soldiers. In the first shot you see him walk to where the .30 cal machine gun position is located. The machine gun is uncovered, then after the camera switches to the dead Japanese and back to machine gun, it's covered by a water proof tarp. Then it shows Leckie again as he's lighting a cigarette with just the tip of the .30 cal machine gun muzzle uncovered.
Continuity mistake: When we see the guy trying to open the coconut with his bayonet, his blade is either on top of the coconut or digging into the coconut depending on the shot. (00:21:20)
Continuity mistake: When Jay realises he pooped himself, his M1 Carbine rifle is on the ground. In the next shot when he looks up to tell the other soldiers what happened, you can see the barrel poking out from the bottom of the screen.