In 1935, Italy invaded Ethiopia and the French government paid increased attention to the defence of French Somaliland. In January 1938 an Italian force moved down onto the plain of Hanlé in French territory and encamped there. Italy claimed that this territory lay on the Ethiopian side of the border, as per the Franco-Ethiopian treaty of 1897. The French colonial minister, Georges Mandel, and the commander-in-chief at Djibouti, Paul Legentilhomme, responded by strengthening the colony's defences to unprecedented levels: 15,000 troops were stationed there and posts were established at Afambo, Moussa Ali and even on the other side of the Italians. The landward fortifications were augmented extensively with concrete.