national spokesman Sean Nethercott and national leader Cahir Healy. June – the first aircraft of the Air Corps arrives at Baldonnel Aerodrome. 1 June – official founding of the Royal Ulster Constabulary. 12 June – at Windsor Castle in England, King George V receives the colours of the six Irish regiments that are to be disbanded – the Royal Irish Regiment, the Connaught Rangers, the South Irish Horse, the Prince of Wales's Leinster Regiment, the Royal Munster Fusiliers and the Royal Dublin Fusiliers. 16 June – pro-treaty candidates receive 75 percent of the vote in the general election. 22 June – IRA agents assassinate British field marshal Sir Henry Wilson in London (they are sentenced to death on 18 July). 28 June – the Irish Civil War and Battle of Dublin begin when the National Army, using artillery loaned by the British, begins to bombard the anti-Treaty Irish Republican Army forces occupying the Four Courts. 29 June – the National Army storms the Four Courts, taking 33 prisoners with the loss of three of their men. 30 June – there is a major explosion in the Four Courts. On orders from Oscar Traynor, Ernie O'Malley surrenders the garrison to Brigadier General Paddy Daly of the Free State's Dublin Guard. Three republicans have died in the siege. July–August 4 July – the anti-Treaty Irish Republican Army captures Skibbereen and Listowel, effectively clearing pro-Treaty troops from County Cork and establishing the "Munster Republic". 5 July – end of the Battle of Dublin. Cathal Brugha refuses to surrender himself and is badly wounded as he tries to leave his garrison in the Hamman Hotel, dying two days later. 8 July – the National Army takes Blessington. 13 July – the Free State government appoints a War Council, comprising Michael Collins, Richard Mulcahy and Eoin O'Duffy, to direct military operations against the Irregulars. 16 July – three hundred IRA members are captured in Dundalk, County Louth, by the National Army. Seventy more surrender in County Sligo and their last stronghold in County Donegal is captured. 19 July – the National Army secures Limerick. 20 July – IRA surrender Waterford. 24 July – a National Army force lands near Westport, County Mayo, and the IRA abandons the town. 27 July – 105 IRA prisoners escape from Dundalk Gaol. 30 July – the Dublin Guard take Bruree. 31 July – Éamon de Valera's Private Secretary, Harry