 Complete the following phrase:  The regiment was formed in November 1899, just one month after the start of the Second Boer War, and by December of that year 8 squadrons had been raised from Uitlanders. They were largely ficed by Wernher-Beit  co. and together with the Imperial Light Horse they effectively formed a Uitlander army. A small portion were used to protect the railway line to De Aar but they mostly served as a part of the Mounted Brigade of the Natal Field Force under Lieutet-General Douglas Cochrane the 12th Earl of Dundonald, taking part in the relief of the besieged town of 