At the Battle of Waterloo, Napoleon endured pain and rode all day. As a result, the hemorrhoids hurt so much that he couldn't sleep that night. Finally, he had to smoke opium to relieve the pain before going to sleep. The drowsiness caused by opium made him re-direct the operation at 1 1 the next morning, wasting more than seven hours, which was the key to strategic initiative. Later, Napoleon was upset by the pain of hemorrhoids and issued a series of wrong instructions, which eventually led to the failure of the French army and the end of Napoleon France. Napoleon was a great man, but he also had the same needs for food, clothing, housing and transportation as ordinary people. Because of the pressure of work, he only sleeps for three hours every day. In order to save time, he wolfed down his meal, which rarely lasted more than 10 minutes, no matter whether it was good or bad. The time for eating is not fixed, and things are always handled between official business and war. This irregular lifestyle made Napoleon suffer from hemorrhoids at the age of 28 because of long-term constipation. When Napoleon's power in Europe reached its peak, he never imagined that he would eventually be defeated by a minor illness.