On Easter Monday, April 24, 1916, a group of Irish nationalists proclaimed the establishment of the Irish Republic and, along with some 1,600 followers, staged a rebellion against the British government in Ireland. The rebels seized prominent buildings in Dublin and clashed with British troops. Within a week, the insurrection had been suppressed and more than 2,000 people were dead or injured. The leaders of the rebellion soon were executed. Initially, there was little support from the Irish people for the Easter Rising; however, public opinion later shifted and the executed leaders were hailed as martyrs. In 1921, a treaty was signed that in 1922 established the Irish Free State, which eventually became the modern-day Republic of Ireland.