In the game, all German Infantry have the Obergefrieter (Corporal) rank insignia.
The K98 rifle used by the Germans is only capable of firing as fast as it is in-game if someone is very experienced in using it. It is not reasonable to assume that this is the case with every German soldier seen using it.
When fired, the MP40's bolt handle does not move at all.
When the Player is tasked with destroying something, the explosives are placed beside the object and not on it, which would limit the damage.
In one town, church bells are ringing even though there is no one to ring them.