In the immediate aftermath of the 1916 Rising Brigadier-General W.H.M. Lowe, commander of the British troops in Dublin during the Rising, handed control over to General John Maxwell.
A total of 3,500 people were arrested, over twice the number that took part in the rising. By the beginning of May 1,600 had been interned in Frongoch, North Wales.
In a series of courts martial beginning on the 2 May, 90 people were sentenced to death on the charge of waging war against the King of England, with intent and for purpose of assisting the enemy. Between the 3 May and the 12 May fifteen of those sentenced to death, including the seven signatories of the Proclamation would be executed by firing squad in the Stone Breakers yard of Kilmainham Gaol.
On the 3 May Patrick Pearse (Pádraig Mac Piarais) the Dublin born lawyer then founder/ teacher at ‘Scoile Éanna’ St. Enda’s School in Ranelagh, Thomas MacDonagh who led the garrison at Jacob’s biscuit factory and Thomas J. Clarke the man who had spent more than fifteen years in English prisons for his involvement in the Fenian movement were executed.
Joseph Mary Plunkett who would marry Grace Gifford hours before he would go before the firing squad, William (Willie) Pearse the brother of Patrick Pearse, Edward (Ned) Daly who was commandant of the battalion stationed in the Four Courts during the Rising and Michael O’Hanrahan second in command to Thomas MacDonagh’s battalion at Jacob’s biscuit factory were all executed.
Major John MacBride who had fought against the British in the Boer War and only joined the Rising as it began. He was executed for taking part in the Rising.
Eamonn Ceannt led the garrison at the South Dublin Union; St. James’s Hospital today and was one of the seven signatories of the proclamation, Michael Mallin alongside Countess Markievicz commanded a small contingent of Irish Citizen Army in St. Stephen’s Green and The Royal College of Surgeons, Sean Heuston who was a member of Fianna Éireann and along with twenty rebels held the Mendicity Institute on the River Liffey for two days and Cornelius (Con) Colbert was executed for participating in the Rising.
Thomas Kent was arrested at his home in County Cork on the 22 April 1916. It was intention to travel to Dublin for the Rising. He was executed in Cork Detention Barracks following a Court Martial.
Sean Mc Diarmada or Sean MacDermott alongside James Connolly served in the G.P.O. during the Rising. James Connolly was stationed at the General Post Office (G.P.O) and during the Rising he was shot in the Ankle and subsequently was executed strapped to a chair. He was the last of the leaders to be executed.
Sir Roger Casement was tried in London for high treason and hanged at Pentonville Prison on 3 August 1916.