We took our first steps in the defence industry in the 1990s, working with Délégation Générale pour l’Armement (DGA) – the French defence procurement agency – to study the acoustic signature of submarines. The DGA & Section Technique de l’Armée de Terre (STAT), the French Army’s engineering section subsequently commissioned Metravib to find a solution for shot detection, a way to assist soldiers who come under fire without knowing precisely where the shots were coming from.