The regiment embarked for Egypt in April 1801 for service in the Egyptian Campaign. The regiment landed at Suez and following a long march across northern Egypt and the surrender of Cairo by the French Army in June 1801, the regiment occupied the citadel at Cairo. The regiment returned to Bombay in spring 1802 and then provided storming parties for two unsuccessful assaults at the Siege of Bharatpur in January 1805 during the Second Anglo-Maratha War. Twenty-five soldiers from the regiment were killed in the disastrous operation. The regiment returned to Bombay in March 1806 and immediately embarked for Goa. The regiment became the 86th (Leinster) Regiment of Foot in October 1809.