Sir Arthur Paget's embassy to Turkey, and the same year he was selected to serve on the staff of Sir Arthur Wellesley in the expedition to Copenhagen.
Still worse was the prospect when Sir Arthur Wellesley with a British force landed in Portugal, gained the battle of Vimiero (21st of August), and brought the French commander, Junot, by the so-called convention of Cintra, to agree to the evacuation of the country by all the French troops.
It was during the campaigns which ensued that General Arthur Wellesley defeated Sindhia and the Bhonsla raja at Assaye, and General Lake won the victories of Farrukhabad, Dig and Laswari over Sindhia and Holkar.
Here he obtained his first opportunity of distinction, being attached in the capacity of diplomatist to the mission of Sir Arthur Wellesley to the Mahrattas.
In the campaign that followed a combined Mahratta army, in which Daulat Rao's troops furnished the largest contingent, was defeated by General Arthur Wellesley at Assaye and Argaum in Central India; and Lord Lake routed Daulat Rao's European trained battalions in Northern India at Agra, Aligarh and Laswari.
The two latter were recalled from the Peninsula; Sir Arthur Wellesley had proceeded to London upon leave, and had only signed the armistice with Junot, not the convention itself.
The British force consisted of 9000 men from Cork, under Sir Arthur Wellesley - at first in chief command; 5000 from Gibraltar, under General (Sir Brent) Spencer; and io,000 under Sir John Moore coming from Sweden; Wellesley and Moore being directed towards Portugal, and Spencer to Cadiz.