had established many British units during the war to serve in North America or provide replacements for garrisons. All but three (the 23rd Regiment of (Light) Dragoons and two Highland infantry regiments, the 71st and 78th Foot) were disbanded immediately after the war. The Army was forced to adapt its tactics to the poor communications and forested terrain of North America. Large numbers of light infantry (detached from line units) were organised, and the formerly rigid drills of the line infantry were modified to a style known as "loose files and an American scramble". While the British defeated the colonists in most of the set-piece battles of the war, none of these had any decisive result, whereas the British defeats at the Battle of Saratoga and Siege of Yorktown adversely affected British morale, prestige and manpower. Historians have examined the issue of responsibility for the defeat in terms of personalities. They also have explored such issues as communications and supply, a lack of defined objectives, and the underestimation of the American forces. Napoleonic Wars The British Army during the French Revolutionary and Napoleonic Wars experienced a time of rapid change. At the beginning of the French Revolutionary Wars in 1793, the army was a small, awkwardly administered force of barely 40,000 men. By the end of the Napoleonic Wars, the army had been through a series of structural, recruitment, tactical and training reforms and its manpower had vastly increased. At its peak, in 1813, the regular army contained over 250,000 men. The British infantry was "the only military force not to suffer a major reverse at the hands of Napoleonic France." The later nineteenth century During the long reign of Queen Victoria, British society underwent great changes such as the Industrial Revolution and the enactment of liberal reforms within Britain. The Victorian era was also marked by the steady expansion and consolidation of the British Empire. The role of the military was to defend the Empire and, for the Army, to control the natives. The Industrial Revolution had changed the Army's weapons, transport and equipment, and social changes such as better education had prompted changes to the terms of service and outlook of many soldiers. Nevertheless, it retained many features inherited from the Duke of Wellington's army, and since its prime function was to maintain the expanding British Empire, it differed in many ways from the conscripted armies of continental