The Swing Riots were a widespread uprising by agricultural workers; it began with the destruction of threshing machines in the Elham Valley area of East Kent in the summer of 1830, and by early December had spread throughout the whole of southern England and East Anglia.
As well as the attacks on the popularly hated, labour-displacing threshing machines, the protesters reinforced their demands with wage and tithe riots and by the destruction of objects of perceived oppression, such as workhouses and tithe barns, and also with the more surreptitious rick-burning, and cattle-maiming. The first threshing machine was destroyed on Saturday night, 28 August 1830, and by the third week of October more than 100 threshing machines had been destroyed in East Kent.
The anger of the rioters was directed at three targets that were seen as the prime source of their misery: the tithe system, the Poor Law guardians, and the rich tenant farmers who had been progressively lowering wages while introducing agricultural machinery. If captured, the protesters faced charges of arson, robbery, riot, machine breaking and assault. Those convicted faced imprisonment, transportation, and possibly execution.
The Swing Riots had many immediate causes, but Prof. J. F. C. Harrison thought that they were overwhelmingly the result of the progressive impoverishment and dispossession of the English agricultural workforce over the previous fifty years, leading up to 1830. In parliament Lord Carnarvon had said that the English labourer was reduced to a plight more abject than that of any race in Europe, with their employers no longer able to feed and employ them.
The name "Swing Riots" was derived from the name that was often appended to the threatening letters sent to farmers, magistrates, parsons, and others, the fictitious Captain Swing, who was regarded as the mythical figurehead of the movement ('Swing' was apparently a reference to the swinging stick of the flail used in hand threshing). The Swing letters were first mentioned by The Times newspaper on 21 October 1830.