Character mistake: When Buster gets hit in the arm the first time, he is busy tying the kerchief below the wound. (02:21:05)
Character mistake: Chamberlain's sidearm is a Colt Army .44, which uses a peg to secure the barrel to the cylinder axle. During the fight, Chamberlain replaces the empty cylinder with a fresh one, pushes the barrel against a log to seat it, but never shoves the peg in. A loose barrel might well result in a misalignment of that barrel with the chamber being fired, which would blow the barrel off the weapon.
Answer: Yes. After the 2nd Maine Infantry was disbanded, there were 120 men with 1-year of service left. They mutinied because they said they only agreed to fight under the 2nd Maine flag and the Army disagreed. So they were marched under guard to the 20th Maine, led by Chamberlain. Chamberlain was able to convince most of them to fight, even though he was ordered to shoot any who did not fight.
Bishop73
Is there a reason why a few of them refused to fight?
Yes. The same reason why they mutinied.