How can you explain the multinational composition of Napoleon’s army?

How can you explain the multinational composition of Napoleon’s army? What plans did Napoleon hatch for the future of Russia?

Napoleon Bonaparte was able to build on his success in the war with European states. He claimed the highest role in the world, as he sought to extend his dominance. His army was multinational for the reason that the annexed states went over to the side of France. He had many allies in the person of the supporters of the regime. This allowed him to conquer new territories. The army was multilingual, but the mercenary army also played a negative role. Many fled from the battlefield in difficult conditions.