At 9:00 pm three Guards regiments arrived on the scene. Although the troops assisted in crowd control, their arrival was also a reaction of the authorities to fears of a possible insurrection, for which the destruction of parliament could have signalled the first step. The three European revolutions of 1830—the French, Belgian and Polish actions—were still of concern, as were the unrest from the Captain Swing riots, and the recent passing of the Poor Law Amendment Act 1834, which altered the relief provided by the workhouse system.