French officers beat and humiliate German bystanders for not having taken their hats off in awe of the French troops - their new masters.
"In 1923, in response to German failure to pay reparations under the Treaty of Versailles, France and Belgium occupied the industrial Ruhr area of Germany, most of which lies across the river on the east bank of the Rhine, until 1925. Many Germans were killed during civil disobedience protests. e.g. against dismissal of German officials."
The town shown in this video is Buer.