The Battle of George Square was a violent confrontation in Glasgow, Scotland between Glasgow City Police and striking Glasgow workers, centred around George Square. The 'battle', also known as "Bloody Friday" or "Black Friday", took place on Friday 31 January 1919, 82 days after the end of the First World War. During the riot, the Sheriff of Lanarkshire called for military aid, and British troops, supported by six tanks, were moved to key points in Glasgow. The strike leaders were arrested for inciting the riot. Although it is often stated that there were no fatalities, one police constable died several months later from injuries received during the rioting.