 Complete the following phrase:  Cronje at last surrendered his field army to Roberts on 27 February. On the morning of Klip Drift French had had 5,027 horses, but by 28 February exhaustion had reduced this number to 3,553. As Roberts prepared to advance on Bloemfontein, French was now, on 6 March, ordered to take his division and two Mounted Infantry Brigades and swing seventeen miles around the left flank of the Boer position at 