Goofs

During the first on-screen assault on Aerok hill, Lt. Soo-hyeok apparently uses his unscoped M1D Garand sniper rifle to launch a grenade at an enemy position. However, previously, and in all other instances, his M1D is fitted not with the grenade launcher attachment but a flash suppressor.

The American F-51 Mustang fighter-bombers seem to have Normandy-style invasion stripes on their wings and bodies. These markings had long been dropped since the end of the Second World War.

The North Korean Mosin-Nagant sniper rifle seen in the film is equipped with a PU scope, but the reticle in the scope does not look like that in an actual PU. Likewise, the M84 scope on the M1D Garand sniper rifle seen in the film has crosshairs that do not match an actual M84.

During the final battle, U.S. Air Force F-51 Mustang fighter-bombers are supposedly bombing the North Korean position. But although many explosions can be seen as the planes are flying over the position, we see no bombs dropping from them. Indeed, they do not even appear to carry any external munitions.

As the squad looks on while Private Seung-shik is being shot up by "Two Seconds" and bleeds out, Master Sergeant Yang's Browning Automatic Rifle appears to have become a filmsy-looking replica.

The U.S. flags at the start of the film are the post-1960 variant with 50 stars.

For some reason, 'Alligator' Company seems to be lacking in automatic weapons or mortars, by then an essential part of land warfare. There are very few, if any, instances where fully-automatic weapons were fired, though they are occasionally seen onscreen.