Answer:
The main goal at the commencement of hostilities was to attack and capture the Coalition forces in what is now called Belgium and to re-annex the country to the French Empire.
Step-by-step explanation:
The Waterloo campaign began with a anticipated attack by the French Army of the North under the leadership of Napoleon Bonaparte.
On 8 June, the first sign elements of the Army of the North moved from their peacetime depots to their rendezvous point just on the French side of the Franco-Belgian border.
They carried an attack that was expected on the two Coalition armies that were in charge in Belgium, which comprised of the Prussian army under the command-ship of Prince Blücher and Anglo-allied army under the command-ship of the Duke of Wellington.
On 15 June, 03:30 precisely, shortly after the commencement of hostilities started the French advanced guard went across the border and met the first Coalition outposts manned by soldiers of the Prussian I Corps (Zieten's).
For the rest of the day the I Corps were occupied in a battle retreat against the overwhelming force of the French Army of the North.
By midnight of 15 and 16 June, the French had went further north and through Charleroi, and in doing so successfully passed the river Sambre, the only important river between the Brussels and French army.