When the main villain is killed at the end. The time keeps changing from night time to dawn.
When Fred has a drink, as his comrades tape up his leg wound, he drinks from a bottle of Jack Daniels. But, in the next few scenes as Doug dies, the bottle becomes Jim Beam.
At around 13 minutes Walter alternates between taking a shot and smoking each time he is shown.
The large flag inside the VFW post was displayed incorrectly. When hung against a wall, whether horizontally or vertically, the union (the blue part) should always be in the upper left corner as viewed.
at about 33 minutes, when the veterans use the pool table to barricade one of the doors, they put it up the wrong way - it would tilt back into the bar at the slightest push. It should have been set up just the other way round.