In January 1814, the anti-French coalition troops came to Paris. All the teachers and students of the Polytechnic School of Paris petitioned Napoleon for a war. The emperor only said one sentence: "I will not kill in order to win a war." Drop a hen that lays golden eggs!" He did not want the future elite of France to serve as cannon fodder in the war. After all, they are future scholars, not warriors. This sentence was later engraved on the ceiling of the Hall of Honor of the Polytechnic in Paris. , becoming the most proud place of the school.