The operations were now being conducted in that extremely acute angle of Natal which runs up between the Transvaal and the Orange Free State. In crossing Botha\'s Pass the army had really entered what was now the Orange River Colony. But it was only for a very short time, as the object of the movement was to turn the Laing\'s Nek position, and then come back into the Transvaal through Alleman\'s Pass. The gallant South African Light Horse led the way, and fought hard at one point to clear a path for the army, losing six killed and eight wounded in a sharp skirmish. On the morning of the 12th the flanking movement was far advanced, and it only remained for the army to force Alleman\'s Nek, which would place it to the rear of Laing\'s Nek, and close to the Transvaal town of Volksrust.
Had the Boers been the men of Colenso and of Spion Kop, this storming of Alleman\'s Nek would have been a bloody business. The position was strong, the cover was slight, and there was no way round. But the infantry came on with the old dash without the old stubborn resolution being opposed to them. The guns prepared the way, and then the Dorsets, the Dublins, the Middlesex, the Queen\'s, and the East Surrey did the rest. The door was open and the Transvaal lay before us. The next day Volksrust was in our hands.
The whole series of operations were excellently conceived and carried out. Putting Colenso on one side, it cannot be denied that General Buller showed considerable power of manoeuvring large bodies of troops. The withdrawal of the compromised army after Spion Kop, the change of the line of attack at Pieter\'s Hill, and the flanking marches in this campaign of Northern Natal, were all very workmanlike achievements. In this case a position which the Boers had been preparing for months, scored with trenches and topped by heavy artillery, had been rendered untenable by a clever flank movement, the total casualties in the whole affair being less than two hundred killed and wounded. Natal was cleared of the invader, Buller\'s foot was on the high plateau of the Transvaal, and Roberts could count on twenty thousand good men coming up to him from the south-east. More important than all, the Natal railway was being brought up, and soon the central British Army would depend upon Durban instead of Cape Town for its supplies – a saving of nearly two-thirds of the distance. The fugitive Boers made northwards in the Middelburg direction, while Buller advanced to Standerton, which town he continued to occupy until Lord Roberts could send a force down through Heidelberg to join hands with him. Such was the position of the Natal Field Force at the end of June. From the west and the south-west British forces were also converging upon the capital. The indomitable Baden-Powell sought for rest and change of scene after his prolonged trial by harrying the Boers out of Zeerust and Rustenburg. The forces of Hunter and of Mahon converged upon Potchefstroom, from which, after settling that district, they could be conveyed by rail to Krugersdorp and Johannesburg.
Before briefly recounting the series of events which took place upon the line of communications, the narrative must return to Lord Roberts at Pretoria, and describe the operations which followed his occupation of that city. In leaving the undefeated forces of the Free State behind him, the British General had unquestionably run a grave risk, and was well aware that his railway communication was in danger of being cut. By the rapidity of his movements he succeeded in gaining the enemy\'s capital before that which he had foreseen came to pass; but if Botha had held him at Pretoria while De Wet struck at him behind, the situation would have been a serious one. Having once attained his main object, Roberts could receive with equanimity the expected news that De Wet with a mobile force of less than two thousand men had, on June 7th, cut the line at Roodeval to the north of Kroonstad. Both rail and telegraph were destroyed, and for a few days the army was isolated. Fortunately there were enough supplies to go on with, and immediate steps were taken to drive away the intruder, though, like a mosquito, he was brushed from one place only to settle upon another.
Leaving others to restore his broken communications, Lord Roberts turned his attention once more to Botha, who still retained ten or fifteen thousand men under his command. The President had fled from Pretoria with a large sum of money, estimated at over two millions sterling, and was known to be living in a saloon railway carriage, which had been transformed into a seat of government even more mobile than that of President Steyn. From Waterval-Boven, a point beyond Middelburg, he was in a position either to continue his journey to Delagoa Bay, and so escape out of the country, or to travel north into that wild Lydenburg country which had always been proclaimed as the last ditch of the defence. Here he remained with his gold-bags waiting the turn of events.
Botha and his stalwarts had not gone far from the capital. Fifteen miles out to the east the railway line runs through a gap in the hills called Pienaars Poort, and here was such a position as the Boer loves to hold. It was very strong in front, and it had widely spread formidable flanking hills to hamper those turning movements which had so often been fatal to the Boer generals. Behind was the uncut railway line along which the guns could in case of need be removed. The whole position was over fifteen miles from wing to wing, and it was well known to the Boer general that Lord Roberts had no longer that preponderance of force which would enable him to execute wide turning movements, as he had done in his advance from the south. His army had decreased seriously in numbers. The mounted men, the most essential branch of all, were so ill horsed that brigades were not larger than regiments. One brigade of infantry (the 14th) had been left to garrison Johannesburg, and another (the 18th) had been chosen for special duty in Pretoria. Smith-Dorrien\'s Brigade had been detached for duty upon the line of communications. With all these deductions and the wastage caused by wounds and disease, the force was in no state to assume a vigorous offensive. So hard pressed were they for men that the three thousand released prisoners from Waterval were hurriedly armed with Boer weapons and sent down the line to help to guard the more vital points.
Had Botha withdrawn to a safe distance, Lord Roberts would certainly have halted, as he had done at Bloemfontein, and waited for remounts and reinforcements. But the war could not be allowed to languish when an active enemy lay only fifteen miles off, within striking distance of two cities and of the line of rail. Taking all the troops that he could muster, the British General moved out once more on Monday, June 11th, to drive Botha from his position. He had with him Pole-Carew\'s 11th Division, which numbered about six thousand men with twenty guns, Ian Hamilton\'s force, which included one infantry brigade (Bruce Hamilton\'s), one cavalry brigade, and a corps of mounted infantry, say, six thousand in all, with thirty guns. There remained French\'s Cavalry Division, with Hutton\'s Mounted Infantry, which could not have exceeded two thousand sabres and rifles. The total force was, therefore, not more than sixteen or seventeen thousand men, with about seventy guns. Their task was to carry a carefully prepared position held by at least ten thousand burghers with a strong artillery. Had the Boer of June been the Boer of December, the odds would have been against the British.
There had been some negotiations for peace between Lord Roberts and Botha, but the news of De Wet\'s success from the south had hardened the Boer general\'s heart, and on June 9th the cavalry had their orders to advance. Hamilton was to work round the left wing of the Boers, and French round their right, while the infantry came up in the centre. So wide was the scene of action that the attack and the resistance in each flank and in the centre constituted, on June 11th, three separate actions. Of these the latter was of least importance, as it merely entailed the advance of the infantry to a spot whence they could take advantage of the success of the flanking forces when they had made their presence felt. The centre did not on this as on several other occasions in the campaign make the mistake of advancing before the way had been prepared for it.