Under Roberts
French was one of the few senior officers to be retained by Roberts. Roberts summoned French to Cape Town on 29 January to inquire about expenditure of horses and ammunition around Colesberg. French came away with the impression that he had "only with difficulty persuaded (Roberts and Kitchener) on 29 January to send the Cavalry Division and himself in command of it". French's insecurity was increased by this turn of events—not only did he belong to the wrong faction in the Army—the followers of Wolseley and Buller—now in eclipse, but he had up until now been denied command both of the cavalry brigade in Natal and the Cavalry Division (instead being given ad hoc forces to command in both cases).
French was affectionate about "dear old Bobs" but sometimes took a dim view of his military abilities. He correctly predicted that the centralisation of transport would lead to a collapse in supply arrangements. French disliked William Nicholson, under whose control Roberts had centralised all transport, and retained autonomy for Cavalry Division transport.
Unlike Roberts, French and Haig believed that cavalry should still be trained to charge with steel as well as to fight dismounted with firearms. They appreciated the value of good colonial troops and trained Mounted Infantry, but had already insisted that the New Zealand Mounted Rifles Brigade fix bayonets to their carbines to use as lances, and were sceptical about the Colonial "Skallywag" units which Roberts was raising. Roberts also appointed Charles Hay, 20th Earl of Erroll as Assistant Adjutant-General (AAG) of the Cavalry Division, with Haig, to whom Buller had promised the job, as his deputy—French did his best to bypass Erroll and work through Haig. On 31 January French returned to the Colesberg front to break up his old command, leaving Maj-Gen Ralph Arthur Penrhyn Clements to cover the Colesberg area with a mixed force.
Kitchener ordered French (10 February) "The cavalry must relieve Kimberley at all costs". French promised Roberts that if he were still alive he would be in Kimberley, where the civilian population was urging Colonel Robert Kekewich to surrender, in five days.
French's Cavalry Division consisted of three cavalry brigades and two brigades of mounted infantry, although the latter did not accompany them when they broke camp at 3 am on 11 March—a separate provisional brigade of mounted infantry was provided instead. Roberts gave an inspirational speech to French's brigade and regimental commanders. Rather than cross the Modder River directly (Kimberley lay around 25 miles north-east), they made an envelopment move: first over 20 miles south to Ramdam, then about 15 miles east to seize the Riet River Crossings, then about 25 miles (roughly north-north-east) to Klip Drift on the Modder, then another 20 miles north-west to Kimberley. This was to be accomplished across arid land in five days, with much of the travel by moonlight as it was the middle of summer. French carried only six days' rations for the men and five days' forage for the horses.
The force left Ramdam at 2 am on 12 February, with only 4,000 horsemen rather than the 8,000 he had expected to have, but French felt he had to push on rather than wait for straggling units to catch up (the brigades' staffs were all new, and brigadiers only joined their units in the course of the march). De Kiel's Drift on the Riet was seized by mid afternoon—French ordered his cavalry to gallop for it as soon as he saw the way was clear—but the crossing was soon in what Haig called "an indescribable state of confusion" as Roberts had neglected to order priority for Cavalry Division baggage. Kitchener, arriving in the evening, ordered French to seize Waterval Drift, another crossing a few miles to the northwest where he had left a brigade masking a small Boer force under Christiaan de Wet. Although this was done, the advance could not be resumed until 10.30am on 13 February, and accompanied by five baggage wagons which had managed to get through the logjam at De Kiel's Drift.
French's division moved in line of squadron columns across a five-mile wide front, halting between 12.30 and 1 pm at the well at Blauuwboschpan, where he left a garrison to hold until the infantry arrived. He brushed aside a small Boer force (perhaps 300 men) which attempted to block his path to the Modder River, but concerned that he might be attacked from the east by de Wet's main force, moved quickly at 2 pm to seize the crossings at Rondeval and Klip Drift (he aimed to at least threaten two crossings to avoid the delay which had happened at De Kiel's Drift). By 5 pm he was able to send a galloper to Roberts with the message that he was across the Modder. He had lost only three men wounded, although 40 horses had died of exhaustion and over 500 were incapable of further work. French then had to wait a day while Thomas Kelly-Kenny's 6th Infantry Division made a forced march from the Riet Crossings to the Modder Crossings, during which time Piet Cronje, believing French's advance to be a feint, missed an opportunity to reinforce the area.
Equipped with three days' supplies, French resumed his advance at 9.30 am on 15 February. At Abon's Dam, five miles north of the Modder, French sent his cavalry, supported by the fire of 56 guns, charging up a valley between two Boer held ridges. The charge was led by the 9th and 16th Lancers. The Boer riflemen, perhaps 600 in number, were able to achieve little at ranges of 1,000 yards.
Amery's Times History later wrote "the charge at Klip Drift marks an epoch in the history of cavalry", arguing that French had "divined" that a cavalry charge made with "reckless, dare-devil confidence" could cut through a line of "unseen" enemy infantry who could have resisted a cautious attack by British infantry. The Official History called it "the most brilliant stroke of the war". He was also later praised by the cavalry writer Erskine Childers and by the German history of the campaign, which cited Klip Drift as evidence that cavalry could still charge infantry armed with magazine rifles. These claims were exaggerated. French had attacked a thinly-held part of the line, under cover of artillery fire and dust clouds, inflicting only 20 Boer casualties to sword and lance (as opposed to 60 at Elandslaagte). French himself saw it as a triumph of the cavalry spirit rather than a charge with cold steel per se.
French entered Kimberley at 6 pm on 15 February, and was entertained at the Sanatorium by Cecil Rhodes, who soon persuaded him to relieve Kekewich, the military commander of the town. Holmes cites this as an evidence of French's tendency to take against people based only on superficial evidence.
French was congratulated by Roberts, and Queen Victoria praised the cavalry's "brilliant success". For his success with the relief, French was promoted for distinguished service in the field on 21 February 1900, from substantive colonel to supernumerary major-general, and to local lieutenant-general. Although French was later criticised for attacking the Boers around Kimberley on 16 February, Roberts' orders to pursue the retreating Cronje did not reach him owing to a cut telegraph line, and there is no evidence that Roberts made further efforts to contact him, although French heliographed to request orders.
Orders to pursue Cronje were hand-delivered to French at 10 pm on 16 February. French had only 1,500 mounted men and 12 guns fit for duty, but, setting out at 3 am on 17 February, he and Robert Broadwood led an advanced guard on a forced march, twice as fast as Cronje's force, to intercept them at 10 am as they tried to cross the Modder at Vendutie Drift (around 30 miles from Kimberley). Outnumbered three to one, and with another 2,000 Boers close by, French held his position long enough for the British infantry to catch up with Cronje's army at Paardeberg.
French was too far away to interfere in the Battle of Paardeberg, although he sent a message urging caution—Kitchener ignored this and launched a disastrous frontal assault on 18 February. French spent the day holding off Boers who attempted to reinforce Cronje's force. French also prevented the main Boer field army from escaping across the Modder River after the battle.
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 Poplar Grove on the Modder River, while Roberts' main force prepared to attack them from the front. Although French now had 5,665 horses again, many of these were of poor quality and sick, and he was short of fodder. On the basis of incorrect information from Colonel Richardson, Director of Supplies, who had not realised that sick horses were also entitled to fodder, Roberts gave French a dressing-down in front of his brigadiers, for consuming too many supplies. This was probably a turning point in their relationship.
French led his men out of camp at 3 am on 7 March, amid confusion as Kelly-Kenny's Division, which was supposed to follow his, had started an hour earlier owing to unclear orders. The moon had set and French had to halt between 5 am and 5.45 am to await daybreak. By 7 am he had reached Kalkfontein Dam, a march of 12 miles, and spent 45 minutes watering his horses. By 7.30 am the Boers began to retreat from their position. Roberts later blamed French for failing to cut them off (and missing a chance to capture President Kruger). French argued that his horses were too weak to do more than trot, and that he was not strong enough as Kelly-Kenny's men had not yet arrived. He concentrated his Division for a pursuit, but even then was beaten off by the Boer rearguard. The Official History supported French's decision, although some felt that French was giving less than wholehearted co-operation after his unjustified public rebuke over the fodder issue. Holmes suggests that French carried out a plan in which he had no confidence because of Roberts' reputation for ruthlessness with unsatisfactory officers.
French and Haig were sceptical about the riding abilities of Mounted Infantry, and felt that Roberts was wasting too many horses on them (Haig letter to his sister 16 March 1900) and that the cavalry had been "practically starving" since 11 February. Bloemfontein fell on 13 March, and soon suffered an outbreak of typhoid. In an implicit criticism of Roberts, French recorded (22 March 1900) that there "would be a grand opportunity for a great strategist at the head of affairs". With Roberts' main army immobilised by disease at Bloemfontein, de Wet was still active making raids around the British periphery. Roberts eventually (20 March) sent French with a single cavalry brigade and some guns and Mounted Infantry in a vain attempt to intercept Jan Hendrik Olivier's column (numbering 6,000–7,000 men) at Thaba 'Nchu. French made another raid to Karee Siding (29 March)—but until the middle of April he devoted most of his energies to inspecting the horses, many of them Argentinian, with which his division was being remounted. French was summoned to see Roberts (5 April 1900), who told him that the fighting at Poplar Grove proved that the future lay with Mounted Infantry.
On the march to Pretoria (early May 1900) French's three brigades made up the left wing of Roberts' main thrust. (Other thrusts were by Bryan Mahon and Archibald Hunter over the Bechuanaland border, by Buller up from Natal and a semi-independent command under Hamilton, which might have been French's had he not been out of favour.) French lost another 184 of his still unacclimatised horses making—on Roberts' orders—a forced march to the Vet River.
Louis Botha was now making a stand along the River Zand, in front of the Orange Free State's temporary capital at Kroonstad. French was ordered to encircle Botha from the left, accompanied by Hutton's Mounted Infantry, while Broadwood struck from the right. Roberts over-ruled French's wish to make a wide encirclement and ordered a shallower one—this lost the advantage of surprise, and Botha pulled his forces back so that French ran into strong resistance on 10 May. Roberts now ordered French to pull back and make a deeper encirclement as he had originally proposed, with a view to cutting the railway behind Kroonstad. However, French's cavalry were now too tired, after an advance of forty miles, to achieve much, and Botha's army escaped. The Times History later praised French's rapidity of movement but criticised him—unfairly in Richard Holmes' view—for failure to concentrate his forces.
Roberts halted in Kroonstad to repair the railway and refit between 12 and 22 May. New horses arrived for French, but a third of them were unfit for action, and French and Hutton were only able to muster 2,330 effectives. French and Hamilton were now sent to threaten Johannesburg from the left.
Roberts entered Johannesburg (31 May) and Pretoria (5 June), although without pressing Botha to a decisive battle in either case. French correctly dismissed talk of victory as premature, and continued to spend much of his time inspecting remounts—the job of Director of Remounts at Stellenbosch had been given to an incompetent and manic depressive officer, who eventually shot himself. French played a key role at the victory over Botha at Diamond Hill (11–12 June) in the north-east Transvaal. French, leading one of his own brigades in the usual encircling movement, came under heavy fire—a medical major was shot at his side—but held his position despite Roberts' permission to withdraw.
In mid-July French operated against de Wet's guerrilla force around Pretoria, although he did not understand that this was an autonomous force, and advised Roberts that the best defence would be to continue to attack Botha's main army. French was then recalled to take part in another attack on Botha's army, but once again Roberts vetoed French's proposal of a deeper encirclement (on the British right this time), allowing Botha's army to escape.
In late July 1900 Reginald Pole-Carew, commander of 11th Division, refused to accept French's orders. French at first asked to be relieved of responsibility for Pole-Carew's sector, but matters were patched up after what French described as a "somewhat stormy" meeting.
By August 1900 the Boer forces had been pushed into the northeast Transvaal. French was holding a position beyond Middelburg, maintaining moral ascendancy over the enemy by active probing and patrolling as he had around Colesberg earlier in the year. Roberts' plan was to push slowly eastward along the Pretoria-Lourenço Marques railway connecting Pretoria with the sea, while he ordered French to co-operate with Buller as he marched up from Natal. French wrote (24 August) "We sadly want someone in Chief Command here". Roberts at first refused French permission to concentrate the Cavalry Division for an outflanking move towards Barberton, an important Boer depot, and when he at last gave permission in late August Botha's force had retreated too far to be encircled as French had intended. Barberton is surrounded by 3,000 foot mountains, and French once again made a bold encircling move—first (9 September) south from the railway to Carolina, deceiving the Boer commandos that he intended to move southwest. He then moved back, and personally led his 1st Cavalry Brigade up a bridle path through the mountains ready to attack Barberton from the west. As soon as Henry Jenner Scobell, who had been sent around with two squadrons of the Royal Scots Greys, heliographed that he had cut the railway, French led his men down into the town. Scobell captured £10,000 in gold and notes, while French telegraphed to Roberts: "Have captured forty engines, seventy wagons of stores, eighty women all in good working order". Boer sniping from the hills ceased after French threatened to withdraw his men and shell the town.
The war seemed over as Kruger left the country on 11 September 1900 (he sailed to the Netherlands from Portuguese Lourenço Marques on 19 November 1900). French was promoted from supernumerary to substantive major-general on 9 October 1900, while continuing to hold the local rank of lieutenant-general.
