Goofs

In the speech that Rogers gives to his men to explain where they are going, near the beginning of the film; he is holding a staff that is above his head by almost two feet. When the scene changes to a close up the staff is now held differently and is well below the height of his shoulders.

When Langdon and Hunk are first talking to Sgt McNott at Crown Pointe you can see a company of blue coated soldiers marching in the background behind the sergeant. The shot then widens and the blue coated soldiers have disappeared.

Rogers' Rangers did not portage their whaleboats over a ridge during the St. Francis raid. This actually happened two years prior when the Rangers portaged their boats from Lake George to Wood Creek in order to avoid French outposts around Fort Ticonderoga (Carillon).

The OP stated that Moses did not fast for 40 days, actually Elijah, Moses and Jesus all fasted for 40 days.

One of the dead Indians in the Saint Francis clearly moves his head to avoid someone running past him.

During the attack on St. Francis, some of the bayonets on the Ranger's rifles can be seen wobbling, indicating they are made of rubber.

There's a lookout up a tree to spot Towne returning to Eagle Mountain; but for some reason the lookout didn't call out the arrival of either of the other groups of men who arrived just before Towne.

Early in the film, Langdon Towne and "Cap" Huff talk to "Hunk" Marriner, who is in stocks; at one point the sound of an airplane engine overhead is clearly audible.

The drawings of Towne are not in the correct style of the eighteenth century. They look exactly like the work of such magazine illustrators of the 1940s as James Montgomery Flagg.

When Rogers is ready to depart with his expedition he salutes his superior with his palm down, in the style of the U.S. Army. Rogers should have saluted palm put, British Army style.

Although the fort where Rangers arrive is in Colonial New Hampshire, the ground inside the fort is covered with desert sagebrush.

Isabel Jewell, portraying Jennie Coit, a woman who was taken prisoner by Indians and had been with them for some time, appears to be wearing lipstick and eye makeup.