The inaccuricies in the combat scenes were appalling. Not only did they have Germans firing Enfields in many scenes, they "flipped" the image more than once to get the guns pointed one way, resulting in southpaw bolt-actions. I don't know what Churchill carried in WWI, but in the Boer War he carried an M96 (broomhandle) Mauser. I suspect that the gas masks were incorrect, too.
The most egregious error involved Patton's "mechanized raid" in Mexico. At one point during the 1914-15 campaign, Patton acquired information that one of Pancho Villa's lieutenants was at a nearby ranch. Loading men into open touring cars, he sped to the site and surpried several bandits. Dismounting from the vehicles, the Americans killed three bandits, with Patton shooting one out of the saddle as he tried to escape.
BUT ON TV-----
A husky, brunette Patton (he was tall, slender and blond) is seen fixing a tripod in a post-1914 automobile and mounting a water-cooled 1917 Browing machine gun. We are then shown three men on horseback being chased along a straight road by this single car, with Patton firing the machine gun over the driver's head.
AND LATER, we see Patton riding into combat in WWI, crouched behind the turret of a WWII Stuart light tank. We DO NOT get to see Patton wounded in the gluteus as he crawled forward under fire.
I'm going to try to find a site to provide feedback to the History Channel, and flame them.