Nothing wrong with a strategic retreat. And the film was more about how the men survived the approaching enemy and how civilians came to the aid of the soldiers.
In the end, the allied forces retook all of Europe and Germany lost, again.
I think the moral of all the world war stories is fuck Germany.
Germany unifies Prussian kingdoms into a homunculus nation with no identity and desire to spread like a cancer
Otto von Bismarck literally says that his treaties through Europe, especially with the Balkans will cause a great war
A great war starts, killing whites, Germany loses a humiliating defeat.
Germany, butt blasted from being effeminate and weak, tries to be a big boy by... making more catastrophic treaties, building a navy because everyone else has one, despite Germans being notoriously bad, nigger tier, swimmers.
Germany gets defeated again, Navy folds so hard that even Somalian pirates unironically hold a higher record of capturing ships.
Now, third time, Germany making atrociously bad treaties, obliterating whites with brown people, setting up an economic catastrophe....
Gee, I wonder what will happen next?