Serious rioting in Belgian coal fields , armoured cars patrol streets . Armoured cars are patrolling the streets in the Charlerioi and Peronnes coalfields of Belgium , following serious rioting as the result of a dispute over wages . Strikers plundered shops and disrupted tramway services . troops have been rushed to the distubed area to keep order . Armoured cars patrolling the streets of Charleroi , keeping order . 11 July 1932 10 July 1932