Day of Days - S1-E2
Revealing mistake: When we see the German getting shot in the trench at the 88 station, a blood squib pack can be seen on his right-hand chest pocket before it goes off. (00:31:20)
Day of Days - S1-E2
Revealing mistake: During the battle to take out the 88s, the camera pans to Lt. Winters reloading his M1 Garand. If you look closely, you can see he is loading blanks into his weapon. (00:31:29)
Day of Days - S1-E2
Revealing mistake: When placing the German grenade into the barrel of the German, gun you can see the cord used to set timer is still attached. (00:36:40)
Suggested correction: The cord doesn't have to be fully removed for it to work so showing it like that is not a mistake. The grenade will smoke quite a bit if the primer is ignited so even if the cord isn't fully removed they'll know quickly enough the pull was hard enough to ignite it.