 This reorganisation formed a major part of the Haldane Reforms, named after the creator of the Act, Richard Haldane.The lessons learned during the South African War of 1899-1902 had reinforced the idea that the regular Army was not capable of fighting a prolonged full-scale war without significant assistance; almost all regular units in the United Kingdom had been deployed overseas within four months of the outbreak of hostilities, and the entire pool of reserve manpower had been exhausted in under a year.There had been no thought before the war to using auxiliary forces overseas; in the event, volunteers had been used on an ad-hoc basis, and a new auxiliary arm (the Imperial Yeomanry) was formed to provide specialist troops, but it was clear that a more effective system was required in future.