At the beginning, Ju 87 Stukas are seen passing above Harry and Sgt Raddings at an altitude of about 50 - 60 meters (200 ft) on a level bomb run, dropping their bomb on the town in front of them. This would not be viable form of attack. The Stuka was a dive bomber and would perform a direct attack (varying between 60 and 90°, but mainly as close to 90 as possible), with the preferred altitude being 4,600 m (15,100 ft), and the bomb released at a minimum height of 450 m (1,480 ft).
When Harry's platoon is held up within Louvain, one soldier is seen carrying the M1928 Thompson, with a 50-round drum magazine. Later, as a column of British soldiers move through a forest, another soldier is seen with the same weapon. Britain didn't get it first shipment of Thompsons until a month after the Battle of France was over. These were in fact a French order that was diverted to Britain, as the French had actually beaten the British on their order with the manufacturer, but their original customers was no longer there to receive them. Farther more, the British never used the drum magazine in combat as it was found too cumbersome, and the rounds rattling around in the magazine made a disturbing noise and also made the gun somewhat unstable. Also, as a plot hole, that Thompson would have done a better job of suppressing the German machine gun than a couple of Lee Enfield rifles.
When discussing the Nazi program of murdering those they deemed inferior, Nancy refers to some of the victims as "children with disabilities." This is a contemporary expression that would have been very unusual to hear in the 1940s. At the time, the most neutral expression would have been "handicapped children." Even through the late 1990s and early 2000s, the term would have been "disabled children." It wasn't until very recently that even that expression fell out of favor and "children with disabilities" became the politically correct expression.
When Nancy Campell typed the news, she used the word, disabilities. She also typed "children with disabilities". The word, disabilities, didn't come into usage until the 1980s. Same for "children with disabilities" (People First Language, which became widespread in the 1990s after the passage of "Americans with Disabilities Act, 1990). She would have chosen the words, "handicapped children", instead.
Although being absent without leave was a military offence, the American term "AWOL" was not used by the British until after 1941.