When he was only fifteen years old, he astonished his parents by announcing his intention to try for entrance to the École Polytechnique in Paris, a great training school for military officers. Such a plan seemed, not only to his parents, but to his many friends, much too ambitious for a barrel-maker's son. But he insisted on trying the examination and passed fourteenth in a class of one hundred and thirty-two. His sister, for whom Joffre always had a great affection, declared that he would have secured a higher rank if he had not passed such a poor examination in German, a language for which he evidently had a strong dislike. Those who have seen his examination papers say that they are models of neatness, clear thinking, and accuracy. Because of his high standing, Joffre was made sergeant of his class at the École Polytechnique. This honor, which made him responsible for the order and behavior of his own classmates, was rather an embarrassing one, for he was not of a domineering nature, and was besides the youngest boy in the hall. He found great difficulty in exercising his authority over these dozen or so lively youths, though he was destined one day to be given command over more than three million men. By hard work he made good progress in his studies. But he did not finish his course, for in 1870 the Franco-Prussian War broke out. Joffre, but eighteen years of age, was made a sub-lieutenant in a Paris fort. That terrible year left its impression upon him for life. He felt the greatest agony at the loss of beautiful Alsace-Lorraine--a part of his own beloved country, taken by the enemy. From that time he lived with one hope--that he might some day be of service in setting right that wrong, in getting back for France that which had been stolen from her. He once said, "I have seen 1870. I have given my life utterly to see that it did not happen again." Thus, it has been said: "The formula for Joffre is easy to find. It is a number; it is a date; it is 1870." What he saw at that time shaped his purposes for the future. Joffre is not only a thinker, but a man of action. He thinks hard for a time, and then feels compelled to put his thoughts into action. The story is told of how Confucius, upon leaving a funeral service, presented his horse to the chief mourner. When asked why he did so, he replied, "I wept with that man and so I felt I ought to _do_ something for him." Joffre thought long and hard and then wanted to _do_ something. After the war of 1870, he went into the engineering corps of the army and for fifteen years served well in building barracks and fortifications. Then he asked to go to Indo-China where France was waging a colonial war. He was commissioned a lieutenant, and at the end of three years returned a captain, with the Legion of Honor.