He became an ensign in the
Royal Irish Artillery in 1800, but at once exchanged into the
62nd, and was put on half-pay in 1802. He was afterwards made a
cornet in the
Royal Horse Guards by the influence of his uncle the
Duke of Richmond, and for the first time did actual military duty in this regiment, but he soon accepted
Sir John Moore's suggestion that he should exchange into the
52nd, which was about to be trained at
Shorncliffe Army Camp. Through Sir John Moore he soon obtained a company in the
43rd, joined that regiment at Shorncliffe and became a favourite with Moore. He served in Denmark, and was present at the
Battle of Køge and, his regiment being shortly afterwards sent to Spain, took part in the
retreat to Corunna, the hardships of which permanently impaired his health. In 1809 he became
aide-de-camp to his cousin
the Duke of Richmond,
Lord Lieutenant of Ireland, but joined the
43rd when that regiment was ordered again to Spain. With the light brigade (the 43rd, 52nd, and 95th), under the command of
General Craufurd, he was on the march to
Talavera which he described in his
History, and had a violent attack of
pleurisy on the way. He, however, refused to leave Spain, was wounded on
the Coa, and shot near the spine at
Cazal Nova. After taking part in the pursuit of
Masséna after he left the
lines of Torres Vedras, he and his brother George were recommended for a brevet majority. He became Brigade Major, was present at
Fuentes d'Onoro, but an attack of fever obliged him to return to England. In England he
married his cousin Caroline Amelia Fox, daughter of General
Henry Edward Fox and niece of the statesman
Charles James Fox. They had a number of children, one of whom, Pamela Adelaide Napier, married
Philip William Skynner Miles and had a son,
Philip Napier Miles. Another daughter, Louisa Augusta Napier, married General
Sir Patrick Leonard MacDougall. Three weeks after his marriage he again went to Spain, and was present at the
Siege of Badajoz, where his friend Colonel McLeod was killed. In the absence of the new Lieutenant-Colonel he took command of the 43rd regiment (he was now a substantive Major) and commanded it at the
Battle of Salamanca. After a short stay at home he again joined his regiment at the
Pyrenees, and secured the most strongly fortified part of Marshal
Jean-de-Dieu Soult's position at the
Battle of Nivelle. He served with his regiment at the battles of the
Nive, where he received two wounds,
Orthes, and
Toulouse. For his services he was made brevet Lieutenant-Colonel, and one of the first
Companions of the Bath. Like his brother Charles he then entered the military college at
Farnham. He commanded his regiment in the invasion of France after the
Battle of Waterloo, and remained in France with the army of occupation until 1819, when he retired on half-pay. As could not live on a Major's half-pay with a wife and family, he decided to become an artist, taking a house in
Sloane Street, where he studied with
George Jones, the academician. ==Historian==