sentences:  In the summer of 1920 he returned to Tipperary and organised several attacks on RIC barracks, notably at Ballagh, Clerihan and Drangan before again moving his base of operations to Dublin.By spring 1920 the political police of both the Crimes Special Branch of the Royal Irish Constabulary (RIC) and G-Division (Special Branch) of the Dublin Metropolitan Police (DMP) had been effectively neutralised by IRA counterintelligence operatives working for Michael Collins.The British thoroughly reorganised their administration at Dublin Castle, including the appointment of Colonel Ormonde de l'Épée Winter as chief of a new Combined Intelligence Service (CIS) for Ireland.