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On 15 July 1916, Lachmann scored his first aerial victory, using a Nieuport to destroy an enemy observation balloon over Ham.
Now flying a SPAD S.XIII fighter, he scored four more kills, one of which was an observation balloon, and another of which was shared with Ralph O'Neill.
On 17 May 1918, he began his campaign against German aerial observers by teaming with Marius Ambrogi to destroy an enemy observation balloon near Juville.
Guyton de Morveau served on the Committee of Public Safety from 6 April 1793 to 10 July 1793, when he resigned in order to devote his time to the manufacture of firearms, and formation of a corps of balloonists for the French Revolutionary Army.
In mid-October 1916, another attempt was made to arm a Halberstadt D.II with rockets, this time for observation balloon attacks with a more formal method, using eight Le Prieur-like rockets mounted on the outer wing struts, the way that the French Nieuport 11 had been armed nearly a year earlier.
By 10 December, he was an ace, with an observation balloon and four enemy planes shot down, including one shared with Maxime Lenoir.
Other notable exhibits include the huge medieval bombard, Pumhart von Steyr, the original shipbuilder's model of the battleship SMS Viribus Unitis, flagship of the Austro-Hungarian naval fleet during World War I, a French observation balloon, the oldest surviving European aircraft, L'Intrépide, and the wreck of SM U-20, an Austro-Hungarian Navy submarine sunk in combat in 1918.