The second campaign, undertaken in 1887-8, was just as active as the first and just as fruitful in results. In the interval, numerous missions of a politico-geographical character were organised. Swamps were drained, bridges thrown over streams, roads traced, and posts founded. Negotiations were resumed with Ahmadou. Soybou, who had continued his violence, was captured and given a soldier’s death, out of respect for his youth and personal courage, and thus, like a good Mussulman, he entered into the Paradise of Mahomet, with the indispensable tuft of hair. It was a chivalrous concession that gained for the Governor new suffrages amongst the tribesmen. Nor did the young chieftain long precede his father to the bourne of defeated rebels, for Mahmadou-Lamine, was presently trapped to his last hiding-place and killed. Galliéni completed his military measures by building a large fort to dominate the district, and then pushed the railway up to Bafoulabé, a considerable performance in a bare, desert country. Remarkable changes took place in the character of the people in a very few years. The Colonel gained more territory by persuasion and negotiation than with the sword. He added 900,000 square kilometres to the French colonial domain, and 2,600,000 to its inhabitants. He was the real creator of the French Soudanese Empire, and laid the foundations of its political and administrative organisation. The results of his experience were embodied in a brilliant book: _Two Campaigns in the French Soudan_. Now he was again in France, a full Colonel, commanding a regiment in the colonial army which he joined on leaving St. Cyr in the War of 1870. With that gallant force, popularly known as the "Porpoises," he was present at the heroic defence of Bazeilles, a hamlet near Sédan, by the famous Blue Division. The Division burnt its last cartridges before yielding to the overwhelming numbers of the Germans, who made prisoners of the survivors. Amongst them was Galliéni. He was interned in Germany, just long enough to enable him to learn the language of the conquerors. It was an early proof of his intellectual alertness.