Goofs

In one scene, Maureen O'Hara's scarf changes color from blue to purple, then back again between shots.

Countess D'Arneau (Maureen O'Hara) joins the prince's company as a "dancing girl" and is present at his dinner. She has a small table with a plate of food upon it before her. When she is asked to dance, since she is a dancing girl, she stands up and walks into the middle of the tent. However, the small table and the plate upon it, are gone.

The Battle of Derna took place in 1805, as stated in the opening of the film. The flag that O'Bannion raises over the city of Derna shows only 15 stars. Kentucky was the 15th state to be admitted in 1792. Tennessee was admitted in 1796 and Ohio in 1803, making a total of 17 states by 1805, meaning the flag should properly have shown 17 stars.

In fact the 15-star flag was the official one from from 4 July, 1795 to 4 July, 1818 even though five more states would join the Union during that time.

Lt. O'Bannon and his men were not aboard USS Essex, they were aboard USS Argus. However, Essex did participate in the Battle of Derne.