CHAUMONT, France — The French Army’s first international drone competition felt a little like a tribute to the drone-racing scene that started it all, said a British pilot who competed in the event on a former United States airbase in eastern France last week. Apart from their combat fatigues, the drone pilots with first-person view goggles and joystick controllers could have been hobbyist racers, maneuvering quadcopter drones through bright yellow gates and an abandoned building. But simulated