Red Clydeside was the era of political radicalism in Glasgow, Scotland, and areas around the city, on the banks of the River Clyde, such as Clydebank, Greenock, Dumbarton and Paisley, from the 1910s until the early 1930s. Red Clydeside is a significant part of the history of the labour movement in Britain as a whole, and Scotland in particular.
Some newspapers of the time used the term "Red Clydeside" to refer, largely derisively, to the groundswell of popular and political radicalism that had erupted in Scotland. A confluence of charismatic individuals, organised movements and socio-political forces led to Red Clydeside, which had its roots in working-class opposition to Britain's participation in the First World War, although the area had a long history of political radicalism going back to the Society of the Friends of the People and the "Radical War" of 1820.[1][2]