How did napoleon succeed in building his empire?

Answer 1

He kept a well trained and large army and he also had several buffer states between his enemies and France. The only two powers that could challenge him were Britain and Russia, and when Britain went to war with America he did pretty much whatever he wanted in Europe.

Answer 2

with his victories behind him, Napoleon was able to create a new European order. From 1807 to 1812, Napoleon was the master of a Grand Empire of three main parts: the French empire, the dependent states, and allied states. The French empire was the core. It included an enlarged France extending to Rhine River on its eastern boundary and the western half of Italy north of Rome.