context: Linois's expedition to the Indian Ocean was a commerce raiding operation launched by the French Navy during the Napoleonic Wars. Contre-Admiral Charles-Alexandre Durand Linois was ordered to the Indian Ocean in his flagship Marengo in March 1803 accompanied by a squadron of three frigates, shortly before the end of the Peace of Amiens.  When war between Britain and France broke out in September 1803, Marengo was at Pondicherry  with the frigates, but escaped a British squadron sent to intercept it and reached Isle de France (now Mauritius). The large distances between naval bases in the Indian Ocean and the limited resources available to the British commanders in the region made it  difficult to concentrate sufficient forces to combat a squadron of this size, and Linois was subsequently able to sustain his campaign for three years. From Isle de France, Linois and his frigates began a series of attacks on British commerce across the Eastern Indian Ocean, specifically targeting the large convoys of East Indiamen that were vital to the maintenance of trade within the British Empire and to the British economy. Although he had a number of successes against individual merchant ships and the small British trading post of Bencoolen, the first military test of Linois squadron came at the Battle of Pulo Aura on 15 February 1804. Linois attacked the undefended British China Fleet, consisting of 16 valuable East Indiamen and 14 other vessels, but failed to press his military superiority and withdrew without capturing a single ship.
question: When did Linois's expedition to the Indian Ocean begin?
answers.text: March 1803 March 1803 March 1803