The number of men required for the first 150 tanks was estimated at 1,500, or ten men for each machine, and 150 junior officers. This personnel was obtained as follows: 600 men were transferred from the reserves in training at the Motor Machine Gun Training Centre and 900 were obtained by special enlistment. Thirty officers were transferred from the Motor Machine Gun Section, fifteen were detailed by G.H.Q., France, and the remainder were obtained by calling for volunteers from units in England and by special selection from Cadet units.
For purposes of secrecy the new formation was “tacked on” to the Machine Gun Corps and was christened with the terrific name of: “Special Armoured Car Section Motor Machine Gun Section.” A month later it became known as the Heavy Section Machine Gun Corps.
The recruiting was very successful, and this was largely due to the untiring energy of Mr. Geoffrey Smith, editor of The Motor Cycle, who spared neither time, trouble, nor money in getting the men.
Towards the end of March the training camp was moved from Bisley to Bullhouse farm, and at this camp all elementary training was carried out, recruits being taught drill, the ways of military life, and the Vickers and Hotchkiss machine guns as well as the Hotchkiss 6-pounder.
The first establishment issued by the War Office provided for 10 companies of 10 tanks each, but within a fortnight this was changed to 15 companies of 10 tanks each, the companies being grouped in 3 battalions. A little later this organisation, at the request of G.H.Q., France, was again changed to one of 6 companies of 25 tanks each.
With a further view of ensuring secrecy it was arranged by Lieutenant-Colonel Swinton that no tanks should be sent to Bisley, but that a training ground, far removed from prying eyes, should be secured. Steps were at once taken to find such a ground, and eventually Thetford in Norfolk was visited and Lord Iveagh’s estate at Elveden selected. The necessary training ground here was taken over and was known as “the Elveden Explosives Area”; and round it at 200 yards intervals were posted groups of sentries of the Royal Defence Corps.
During the early part of April a certain amount of grumbling on the part of specially enlisted men occurred at Bisley. They had been induced to join an Armoured Car Service, and for six weeks they had not even seen the wheel of a car. They were asked to exercise a little patience and were promised a surprise. At Elveden the surprise was revealed to them, and when they had got over their astonishment on seeing the first Mark I tank approach them they set down to work with a will, which, it is an honour to record, was never abandoned by all ranks of the Tank Corps from this day on to the conclusion of the war.
The camp at Elveden was placed just outside the “Explosives Area” and no one was allowed to enter the area without a special permit. Companies, before they proceeded overseas, however, spent their last three weeks within the area. As soon as this necessary ground had been taken over, three pioneer battalions were brought to Elveden Camp and a complete series of trenches was dug on a front of a mile and a quarter, and to the depth of two miles. The plan of this work was laid out by Major Tandy and Captain Martel, both R.E. officers.
Unfortunately, on account of delay in delivery of tanks, constructional defects and repeated requests from G.H.Q., France, that all available tanks and crews should be sent out to France for the September operations on the Somme, little use was made of these trenches, for tactical training. Machine-gun firing from tanks with ball ammunition was, however, freely carried out, and also 6-pounder practice which, unfortunately, was much hampered by danger restrictions.
The tank drivers were all drawn from the A.S.C., and the 711th Company A.S.C. was formed to include these men, the workshops, and the M.T. personnel of the Heavy Section. The officer in command of this company and in charge of all mechanical instruction and driving was Major H. Knothe, D.S.O., M.C.