Continuity mistake: When the General gives Donald a piece of paper to sign, the wording on the paper changes between shots.
Continuity mistake: When the drill sergeant tells Donald not to move a muscle, there is nothing between Donald's feet but in the next shot an anthill has suddenly appeared.
Continuity mistake: When Donald crashes to the ground after the drill sergeant spun him round, his rifle is positioned by his side but when he tells the drill sergeant "I quit!", the rifle is now in front of Donald.
Continuity mistake: When the drill sergeant spins Donald around, he crashes down and you can see there is a footprint in the ground behind him, but when we see Donald a few shots later, the footprint has disappeared.
Continuity mistake: When Donald tears the brim off his army hat with the bayonet of his rifle, the size of the torn off brim goes from small to large between shots.
Continuity mistake: At the training camp, Donald cuts off the drill sergeant's tie with the bayonet of his rifle and you can see that the bottom piece is on the drill sergeant's shirt, but in the next shot the piece has disappeared.
Continuity mistake: When Donald is marching around the field at the Training Camp, the background behind him changes between shots.
Continuity mistake: When one of the doctors puts an alarm clock next to Donald's head, the time on the clock initially reads 2:00 but in the next shot changes to 4:00.
Continuity mistake: When one of the doctors touches Donald's stomach with a stethoscope, Donald has his hat on his head, but when Donald is pulled off in the next shot, his hat has disappeared.
Continuity mistake: When Donald is speaking to the General at his desk, the books on the General's desk change between shots.
Continuity mistake: When Donald is pretending to play the flute, he sees a poster of a majorette and on the poster it reads "Fall In - it's time to fly." But when we see the poster a few seconds later, the "It's time to fly" has disappeared.
Continuity mistake: When we see Donald Duck at the beginning of the cartoon, he is holding a piece of paper in his left hand, but in the next shot the paper has disappeared.