Explain Napoleon's inauguration of the French Empire.

France was an established imperial power with holdings beyond its European territorial borders. However, after Napoleon assumed the title of "Emperor of the French," the young republic started on its path to becoming an empire. Napoleon worked to grow and consolidate the military wing, which resulted in military victories against Russia and Austria, among other European countries.
Napoleon maintained armies in different European countries including Spain and Germany. His subjects grew to over fifty million at the height of the empire. It has been claimed that Napoleon had taken a serious interest in controlling the Mediterranean and increasing influence in the Indian Ocean in order to control Europe’s trade and economics. Apart from military conquest, Napoleon was also revered for the codification of the civil law (Napoleonic Code), which guaranteed the gains of the French Revolution were legally protected.
https://www.britannica.com/biography/Napoleon-I