So, back when Napoleon was the boss of France, he had a big army that he used to conquer other countries.
And one important thing about armies is they need horses to carry everything.
Horses were used to pull carts and cannons, and soldiers rode horses too.
But it wasn't just any horses that were used in the army. They needed strong horses that could run fast, carry heavy stuff, and not get scared by all the noise and chaos of a battle.
These special horses were called "war horses" or "cavalry horses."
Napoleon's army had a lot of these horses, and they were treated really well because they were so important to the success of the army.
But wars are really hard on horses, just like they're hard on people. Horses can get injured or sick, or they can be killed in battle.
So even though the horses were well-trained and taken care of as much as possible, they were still in danger during the Napoleonic Wars.
In the end, both sides used horses a lot in the wars, and it was a big part of how they fought.