It may not be generally known, perhaps, that balloons have actually been used in war. They were first introduced to this new field of action at Valenciennes in 1793, and the result of the experiment was a failure; not, however, owing to the fault of man, but to the unpropitious nature of the winds. The garrison, being hard pressed by the English and their allies, attached a letter, addressed to the National Assembly, to a small balloon, or parachute, and committed it to a breeze which blew in the direction of Paris. Towards evening the wind changed, and the faithless messenger fell into the enemy's camp! About the same time the subject of war-balloons was brought before the Committee of Public Safety, who commissioned a young captain of Engineers, named Coutelle, to make experiments, and report on the matter. He made a balloon twenty-seven feet in diameter, with a car to hold two persons, which, when filled with hydrogen gas, was capable of lifting about a quarter of a ton, and cost a little above 80 pounds. It was not intended that this balloon should go free. It was to be held down by two guy-ropes, each between four and five hundred yards in length, by which, when at the full length of its tether, the balloon was to be hauled about in any direction, pulled down, or allowed to rise in obedience to the wishes of the aeronaut, who was to communicate his orders by means of a system of signals. Reports of what he might be thus enabled to discover of the enemy's position were to be written on slips of paper, put into small sandbags, and tossed overboard. Small coloured flags were attached to each bag, so that it might be easily observed in its descent. After several satisfactory ascents to the height of above 500 feet had taken place--the balloon being held easily by ten men, five to each guy-rope--an order was given, in April 1794, for the formation of a company of military aeronauts--styled _aerostiers_, to which Coutelle was appointed captain-commandant. His company consisted of one lieutenant, one sergeant-major, one sergeant, two corporals, and twenty privates, who wore a dark blue uniform, with black velvet facings, and were armed with pistols and swords. This new and peculiar company of aerostiers was very soon sent to join the army at Maubeuge, and was regarded with some ridicule and contempt by the rest of the army. Coutelle, however, took an effectual method of commanding respect. He begged that he and his men might be allowed to take part in a projected _sortie_. They were permitted, and went; an officer and private were wounded, and the corps behaved with such gallantry that it was from that time treated with becoming respect. Ascents were made daily in the balloon for reconnoitring purposes, and the Austrians fired at their audacious and inquisitive enemy both with muskets and cannon, but without effect.