But it was not long before his regiment experienced the fate of the old 101st; this time however Kempt was retained on full pay in the recruiting service.

In April 1803 he joined the staff of Sir David Dundas, but next month returned to regimental duty, and a little later received a lieutenant colonelcy in the 81st Foot.

[2] Employed from 1807 to 1811 on the staff in North America, Brevet-Colonel Kempt at the end of 1811 joined Arthur Wellesley, Marquess of Wellington's army in Spain with the local rank of major general, which was, on 1 January 1812, made substantive.

Kempt was appointed to lead the 8th British Brigade in the army Wellington assembled in Belgium to invade France.

At the Battle of Quatre Bras, Kempt's brigade was involved in heavy fighting and suffered 638 killed and wounded.

[2] At the time of his death at his home in South Audley Street, London in 1854[9] he had for some years been a full general and left a personal fortune of some £120,000.