What was Napoleon's final military campaign ​

The Battle of Waterloo?

Explanation:

The Waterloo Campaign

The Waterloo Campaign (June 15 – July 8, 1815) was fought between the French Army of the North and two Seventh Coalition armies, an Anglo-allied army and a Prussian army, that defeated Napoleon in the decisive Battle of Waterloo, forced him to abdicate for the second time, and ended the Napoleonic Era.

Explanation:

an economic reason that the south needed a reconstruction plan is that plantations, factories, and other businesses were destroyed during the war.