Napoleon Bonaparte was a French military leader who became Emperor of the French in 1804. He first gained attention as a general during the French Revolution and played a key role in several military campaigns across Europe and the Middle East. His leadership during the French Revolutionary and Napoleonic Wars expanded French influence and reshaped European politics. As a ruler, Napoleon introduced significant legal and administrative changes in France and other territories under his control. His reforms included the establishment of the Napoleonic Code, which influenced legal systems in many countries. Napoleon's reign ended after his abdication in 1814, with a brief return to power during the Hundred Days in 1815.