 It was the most significant uprising in Ireland since the rebellion of 1798 and the first armed action of the Irish revolutionary period.Sixteen of the Rising's leaders were executed in May 1916, but the insurrection, the nature of the executions, and subsequent political developments ultimately contributed to an increase in popular support for Irish independence.Organised by a seven-man Military Council of the Irish Republican Brotherhood, the Rising began on Easter Monday, 24 April 1916 and lasted for six days.