When Pug and President Roosevelt and Mrs. Roosevelt speak in the Oval Office, the shadow of a boom mic is repeatedly visible on the wall behind them. [Part 4, Scene 1, time index 2:56, 3:24, 5:10, 6:30]
The German General Alfred Jodl is incorrectly given the rank of Field Marshal, a rank he never held. When the sequel War and Remembrance was produced, he was still given the wrong rank, but in that case it's a lower rank than it should have been, and which would have been more correct for the time period of Winds of War.
In the final scenes, Capt. Henry drives the 1940 Lincoln Continental up to the non-existent cliff (previous entry) and stops the car on a dirt road with the wheels straight forward. He then gets out of the car. In the last helicopter shot of Henry and the car, the Lincoln is now off the dirt road, in soft soil and the front wheels are turned to the right.
As Pug and Palmer talk before dinner, Pug is holding his drink with one hand, then with both between shots; a moment later, Palmer is holding his with his left hand, then suddenly is sipping it, then repeats. [Part 6, Scene 9, time index 1:30:24 and 1:31:15]
During the Battle of Britain scenes, Air Chief Marshal Dowding (Head of Fighter Command) is incorrectly referred to twice as 'Air Vice Marshal'. Air Vice Marshal is 2 ranks lower than Air Chief Marshal. However, he is seen wearing correct rank insignia for Air Chief Marshal which is 1 row of broad black/blue braid, and 3 rows of medium black/blue braid around the cuffs of the uniform jacket.
In many episodes of Winds of War, we see many Royal Navy Officer's and Ratings sporting a moustache, NO Royal Naval Officer or Rating would ever have just a moustache, a Royal Navy Officer may sport a Van Dyke, even a full beard, but no Officer or Rating would ever just have a moustache.
During the scene where Captain Henry flies in the RAF bombing raid on Berlin, the aircrew keep calling him 'Admiral' as they were mistakenly told he was an Admiral at the briefing. Even if this had taken place, all officers are addressed as 'Sir' by ranks junior in the RAF. They would have addressed him as 'Sir' not 'Admiral'.
When Commander Henry is assigned to convoy duty, he is seen on the bridge with other officers and sailors, all wearing talkers helmets. Only talkers wore them (this type of helmet allows the wearer to use earphones). Everyone else should have been wearing regular helmets.
The series takes place in the late 1930s. At the horse race in Italy, people are wearing Adidas shoes and 1970s clothing. Most of the women in Warsaw have 1970s and 1980s dresses and hairstyles; only Ali McGraw and other speaking characters are in period clothing. At Warren's wedding, all of the bridesmaids have late '70s/early '80s dresses and feathered hair.
When Byron and Slote walk down the sidewalk in Berlin, the sign on the gray building behind them says Gradska Stedionica (Serbo-Croatian for Municipal Savings Bank), showing the scene was shot in the former Yugoslavia.
As the U-boats are submerging after the convoy confrontation it is clear that the footage of the subs surfacing was simply used in reverse. You can even see the Wolf Pack Commanders sub submerging while going backwards.