The British Army took part in numerous operations, ranging from small expeditions to the West Indies, Africa and along the European littoral to major operations in Portugal, Spain and Belgium. Initial struggles with these responsibilities, together with those of imperial policing and maintaining order in Ireland would oblige the Army to implement extensive reforms, particularly in tactics and unit organisation, even while the system of purchase for officers remained intact. While British infantry produced mixed results in the field during the French Revolutionary Wars, in time it became noteworthy for its musketry and remarkable doggedness in battle. Chronically understrength and notoriously difficult to control, the cavalry tended to play only a minor part on campaign, while shortages of artillery and engineers plagued the Army throughout this period. Albeit comparatively small, in creating an Iberian foothold which soon developed into a major theatre of operations, the instrument forged in the battles and sieges of the Peninsula and southern France helped drain Napoleon’s resources over a substantial period and established the high standard of battlefield performance which was to reach its apogee on the field of Waterloo, from which would emerge one of history’s greatest commanders – the Duke of Wellington.