Several continuity errors involving glass beer steins occur when the refugee dinner begins. Scenes quick cut from tables with a few steins on each to tables with many nearly empty steins to the steins suddenly becoming full of beer (time approximately 1:02.)
When Byron Henry and The Swedish Ambassador arrive at the Polish boarder station, the Polish officer salutes the ambassador by stretching out four fingers, which would be against the Polish Armed Forces regulation. The Polish Armed Forces are the only military entity in the world to use a two-finger salute, which in return is very similar to that of the salute of the boy scouts.
Pug Henry and Byron Henry discuss the sinking of the HMS Royal Oak by a German U-Boat. The scene cuts to Hitler and his generals on September 29, 1939. The Royal Oak was sunk on October 14, 1939.
In the German Command Center on the morning of the Polish invasion, several of the German officers are shown to already be wearing World War II campaign and service medals, including the 1939 version of the Iron Cross. While these awards were created relatively soon after the outbreak of war, it is unrealistic that any German officer would already have been awarded them before the initial invasion.
On the day of the Polish invasion, several German generals are already shown to be wearing the Iron Cross of 1939 (instituted after the Polish campaign was over) as well as other ribbons and badges not issued until the invasion of the Soviet Union two years later.
As the refugee train pulls out of the station, the last car has a flashing red end of train device. The ETD (or FRED) was first introduced in the USA in 1969 (time approximately 1:17.)
After Warren's wedding, Rhoda and the family pile in the car to take Pug to the airport. Rhoda begins singing "Bellbottom Trousers" by Guy Lombardo. However, the wedding was a year before Pearl Harbor, and the song wasn't released until April, 1945.