Confused

I'll take a shot, I collect these Italian/Spanish WW2 potboilers and am working on a book about them.

1) The film was shot without any recorded dialog on set: ALL of the sounds heard are the result of post-production editing. The ambient sounds such as gunfire or the tanks etc were the work of what we would call Foley Artists nowadays, but the dialog was recorded by a subcontracted company that specialized in providing English dialog for European genre films (Spaghetti Westerns, Gothic horrors, "Komissar X" type spy/crime movies) working from a script provided by the film company. The voice actors used were usually drawn from a stock group of performers specifically recruited for their ability to speak different languages, though the three principal leads -- Stan Cooper, Erna Schürer and Guy Madison -- probably did their own dubbing as I recognize their voices from other productions. Or at least, the voices of the voice actors who usually performed for them, though Guy Madison definitely read his own lines.

So because the dialog you are hearing is removed from the context of the film -- that is, it's just actors sitting in a studio reading from a script -- nuances like local dialect or vocal mannerisms are missing for the simple reason that there were no instructions on the script for the actors to use various inflections when reciting their lines. The film was made as cheaply and quickly as possible and these sort of nuances were one of the penalties of that process.

2) The producers were working with a limited budget and one of the things they could probably afford were lots of jeeps. So, they used them. You also need to bear in mind that the production company making the film was used to making Spaghetti Westerns. Since everybody in a Western rides their own horses, it probably made sense to provide soldiers in a mechanized army with their own jeeps.

3) As one of the reviewers here points out, the actual tank being used was a US Army surplus vehicle that likely did run on standard gasoline. Since they were not using an actual German diesel fueled tank (they were all pretty much destroyed during the war other than very rare examples that were beyond their budget to book for the shoot) and the filmmakers were not historians trying to re-create "actual" events, it makes sense that such a detail might slip their minds. It also makes the reason for why the tank crew might mix with civilians who presumably would have access to standard gasoline. Then again they could just as easily have said they needed diesel and simply used standard gasoline anyway: It's a detail that was unimportant to the filmmakers in telling the story they were relating.

4) A common attribute in all of these films is that while nobody seems to be burdened down with bulky packs there's plenty of ammunition to go around, nobody goes hungry, and medical packs all of a sudden appear out of thin air during the Wounded Comrade scenes.

5) The film was shot in Catalonia and Andelusia in Spain substituting for France, which are both arid enough climates to stand in for the American West in their Spaghetti Westerns. It was cheaper and more expedient to film in Spain then France itself, so that's where they filmed the movie.

6) The French are historically a silly people and it is best not to give them too much thought. Just like this movie.

1.) There were Spanish and Italian actors pretending to be french.

2.) There were probably no military technical advisors involved in the production of the film.

3.) They were using Spanish military issued M-47/48 Patton battle tanks aquired from the United States which they pretended were the Deutsch Panzer Laier. However there was a small ring of truth to this-the original German Tiger tanks did run on gasoline as opposed to American M-47/48/60 tanks that ran on diesel fuel and Adolf Hitler did have the idea that during his ordered counter offensive in Ardenesse (pronounced simply Arden in French) that they would just simply rely upon captured enemy gasoline to keep on going, however ridiculous it may have been ...

4.) This question is obvious, but what's even worse than that is no firearm in the history of the human race even in present day 2009 is or has ever been capable of firing at such an automatic/simultaneous/machine gun rate for that long (even if that much ammunition was there). Even if the weapon had a smoothe bore barrel it would still ultimately melt into a pile of molten metal mush !!! If you don't believe me then get yourself a hacksaw and find a cheap iron bar or shaft and secure it in a shop vice and start cutting it as fast as you can ROFLLLL. Then feel how feel how hot the hacksaw blade gets. Next, try to imagine how hot the barrel of any gun will get if upwards of 600 metal projectiles "bullets" a minute are rubbing along the twists of the inside of any metal tube.

5.) They were never in France, Belgum, or Germany. I'm pretty sure they were somewhere in the Italian Alps, Sicily, southwest Spain, or somewhere where there is most rock and sand.

6.) Culture, that's a little difficult

And people complain about the accuracy of Hollywood films...