The Marquis de Vauban (1633-1707), Marshal of France and special military advisor to King Louis XIV, was a French military engineer who consolidated and significantly improved the country’s border defences. A prolific builder, he upgraded some 3,000 cities’ fortifications and built 37 new fortresses. These defences remained untouched until the end of the 18th century, when progress in artillery rendered the fortresses obsolete. As an essayist, he developed new standard methods of attacks on fortresses and wrote a memorandum on new French frontier landmarks in France. The Vauban Sessions are an initiative of the Rapid Reaction Corps – France (RRC-FR) and CEIS-Forward Global and aim to bring together representatives of military forces from across the NATO Alliance and beyond to exchange lessons learnt and best practices linked to the digital transformation of our Armed Forces.