In February 1915, Wimborne was appointed
Lord Lieutenant of Ireland in succession to
Lord Aberdeen. At this time, the Lord Lieutenant was largely a ceremonial position; real power was in the hands of the
Chief Secretary and the
Under-Secretary. Determined to be more involved in decision-making, he was appointed Director of Recruiting in October 1915, heading up the new Department of Recruiting for Ireland. On the weekend preceding the
Easter Rising, following the capture of the German arms ship
Aud and the arrest of Sir
Roger Casement, Wimborne urged Nathan to order the arrest of a large number of rebel leaders. Nathan was unwilling to do so without the authorisation of the Chief Secretary,
Augustine Birrell, who was in London. Before the authorisation was received, the Rising began on 24 April 1916. Wimborne proclaimed
martial law in Dublin. Thereafter, the military took control. A new Commander-in Chief, General Sir
John Maxwell, arrived in Ireland on 28 April and the rebels surrendered on 29 April. Wimborne initially refused to offer his resignation after the Rising. He resigned under pressure from the government but was re-appointed. In June 1916 he directed the establishment of the
Property Losses (Ireland) Committee to assess the many insurance claims resulting from the Rising. The
Royal Commission on the 1916 Rebellion (the
Hardinge commission) exonerated Wimborne of any blame for the Rising, saying that his position as Lord Lieutenant was "anomalous in quiet times and almost unworkable in times of crisis". He continued as Lord Lieutenant for another two years. On his retirement in 1918, he was created
Viscount Wimborne, of
Canford Magna in the County of Dorset. ==Marriage and issue==