This is not an over-statement. From the first the French, who had thought out the whole business, laid great stress on reconnaissance and control of artillery fire as the main uses of aircraft. For reconnaissance the aeroplanes were practised to co-operate with cavalry. For fire control official maps, divided into geometrical squares, so that a pair of numbers will identify a position within a score or so of yards, were supplied in duplicate to the pilots of the aeroplanes and to the commanding officers of batteries. The system of signalling employed was mostly primitive, but already in 1911 the French were experimenting with captive balloons which received the messages from the aeroplane, and by wireless, or some kind of visible signal, transmitted them to the guns. 'Practice', says Lieutenant Glyn, 'has made almost perfect a remarkable system which renders the efficient French artillery more formidable than ever.' Further, infantry were trained to co-operate with aircraft, so as to learn to take advantage of the new arm; and aerial photography was practised, under strict conditions of secrecy, with a surprising degree of success. In short, almost all the uses which later became the commonplaces of the war were exemplified in the French manoeuvres of 1911. Battle in the air and the use of aircraft as a weapon of direct offence were later developments. In October and November of the same year Captain F. H. Sykes, of the General Staff, and Captain J. D. B. Fulton, of the Air Battalion, visited many of the French military and civil aerodromes, and were present at the military aeroplane competition at Rheims. 'The trials held at Rheims', says Captain Sykes, 'are considerably in advance of anything yet attempted.' The machines were flown by the best available pilots, and were under the personal supervision of the makers and designers. Aerodromes were better and more numerous than in England; many of them were situated in wide plains, so that the learner could make his first cross-country flights over good even landing ground. Captain Sykes, in his report, suggests that aeroplane sheds should be erected and flying schools started at stations not very far apart from one another in England, so that cross-country training may be facilitated. 'These stations should be as near as possible', he adds, 'to where troops are quartered, so as to afford an opportunity for aeroplanes to work with troops on field days. The cost would, I think, be inconsiderable in comparison to the value gained.' This suggestion was carried out, but not until the war had compelled an immense expansion of the air force.