The jacket worn by Private Webster changes from that of a staff sergeant to a private in subsequent scenes.
When Capt. Nixon enters the post office to get his mail, he is not wearing or carrying a helmet. When he leaves and is reading his letter, he is wearing a helmet.
At the beginning of "Why We Fight", the date states April 11, 1945 Thalheim, Germany and the scene is with Capt. Nixon addressing a couple of the men on a balcony watching musicians play a Beethoven piece. Then it flashbacks to a month earlier. At the end, it flashes forward to the original scene and Capt. Nixon states Hitler shot himself. Hitler committed suicide on April 30, 1945.
When the German government announced that Hitler had died, they claimed he had been killed leading troops in combat in Berlin. It would have taken some time afterward to establish the fact that he had killed himself.
Two German children watch the parade of German POWs from a bridge and talk about the passing American armor. One of the children says "Schau mal, es hat da gerade ein Flugzeug abgeschossen", which means "look, a plane has just been shot" and is obviously not the case. The other child answers "Wow, cool!" which would definitely not be said by a five-year-old German in 1945.
During Nixon's briefing, while reading the paper, he mentions "Rita Hayworth's getting married." Rita Hayworth was married to Orson Welles from 1943 to '48.
At some point the men of Easy Company witness the execution of German POW by French Soldiers. These French Soldiers wear Adrian helmets, great coats and puttees as the French army wore at the beginning of the war and during the French defeat in 1940. Though Vichy troops stuck to that equipment until 1942, Free French Forces were equipped with a mixture of British and American gear. The French soldiers that invaded Germany in 1945 would have been dressed like US GIs or British Tommies.
When Easy Company are giving out food to the prisoners at Landsburg, they are told by the regimental surgeon that the prisoners must be kept in the camp to monitor their health/nutrition. However when Nixon returns the next day to see the German citizens burying the bodies of the prisoners in accordance with martial law, none of the prisoners can be seen in the camp. The prisoners were however ordered back into the camp until proper accommodation could be found in town, which apparently happened before said scene.
When Webster confronts the German baker who protests his bread being commandeered for the concentration camp inmates, Webster points his .45 at the baker. The rear sight of the pistol is clearly visible, and has a white dot on either side of the notch. Some modern pistols have "three dot" sights (the front sight also has a dot, and aligning all three on the target aims the shot), but WWII government issue .45s had sights that were the same dull dark gray finish as the rest of the pistol.
At 29m05s in Ep9, over Capt. Nixon's left shoulder behind the marching German troops can be seen Bagger 293 or similar, modern bucket wheel excavator, one of the largest mining machines on the planet.
The scene showing thousands of German POWs trudging down the highway median was based upon a photograph taken north of Frankfurt, several hundred miles from Landsberg. There was no major highway (Autobahn) nearer to Landsberg than over 25 miles away in Augsburg.
At different times during the episode David Webster can be heard swearing at both a column of surrendered German soldiers and a German baker. In real life, Webster hated when people swore, finding it a coarse, undignified form of communication. While Webster stated he grew to tolerate it somewhat, he never swore himself.
Private Webster speaks German, yet in two scenes where he is speaking to Germans he addresses them in English. First is where he threatens the baker and the second is when he shouts abuse at surrendered troops from the back of the truck. In both cases he would use his German to non-English speakers.
When Capt. Nixon is asking the clerk about finding some whiskey, Pvt. Janovec walks in and says, "Did you hear the news? 300,000 krauts just surrendered! We're moving out in an hour." Nixon asks, "One hour?" and Janovec responds, "Yeah." Although the men of Easy Company were generally laid back socially, Janovec was supposed to have answered with "Yes, sir" (or something similar) due to Nixon being a superior officer.
When Liebgott is translating for the prisoner, you can see the pierced earlobe of the actor, Ross McCall.