Early career Monson joined the
British Army on 22 May 1777 as an
ensign in the
12th Regiment of Foot. His military service was almost entirely confined to the
East Indies, where he was based from 1780. He was promoted to
captain in the same year, joining the
14th Regiment of Foot. The
Third Anglo-Mysore War began in 1790, and in 1792 Monson played a prominent role in the
Siege of Seringapatam. Commanding the
light company of the
52nd Regiment of Foot, on 22 February he captured the southern entrenchment surrounding the city. Despite Monson's successes,
Lord Cornwallis, the
Commander-in-Chief, India, did not support him; Cornwallis declined to make him his
aide de camp and vetoed a request from
Nizam Ali Khan, Asaf Jah II,
Nizam of Hyderabad, for Monson to lead his army. Promoted to
brevet major on 1 March 1794, Monson transferred to hold the rank substantively in the 52nd on 2 September 1795. Still in the East Indies, he was promoted to
lieutenant-colonel in the
76th Regiment of Foot, a regiment recently arrived in the sub-continent, on 21 December 1797.
Senior command The new Commander-in-Chief, India,
Gerard Lake, appointed Monson to command the 1st Infantry Brigade in 1803 for the
Second Anglo-Maratha War. Invading northern India, Monson led the attack at the successful
Siege of Aligarh on 4 September; in doing so he received a severe wound which left him incapacitated for six months. s attack Monson's force during the
Battle of Mukandwara Pass|thumb In April 1804 Lake sent Monson in command of a force of around 4,000
sepoys to reconnoitre the positions of
Yashwantrao Holkar around
Jaipur. The force arrived on 21 April and Monson commenced a poorly considered advance on Holkar, who put Monson to flight in the disastrous
Battle of Mukandwara Pass, also known as Monson's Retreat. Only several hundred of Monson's original 4,000 survived. While Monson was overwhelmingly at fault for the result at Mukandwara, Lake had also made mistakes in providing him with too small a force and not reacting to the start of the retreat. Lake therefore continued to support Monson, appointing him second-in-command to
Major-General John Fraser for the final operations against Holkar. Monson was promoted to brevet
colonel and created an aide de camp to
George III on 1 January 1805. Undertaking the
Siege of Deeg, during the
Battle of Deeg on 14 November Fraser was mortally wounded and Monson took command of the campaign. In February 1806 the
Siege of Bharatpur was going on unsuccessfully, with three failed assaults. Lake assigned Monson to command the fourth and final attack on the fortress on 21 February, which also failed. With the Second-Anglo Maratha War having ended, Monson returned to Britain. He had no further active military service. ==Political career==