Marengo and Copenhagen became well-known names at the beginning of the 19th century. What were they?

Question

In the 19th century in Europe, cubebs, known as Piper cubeba, tailed pepper, or Java pepper, were thought to be possibly a useful medicine in the treatment of what?

Answer 1

Horses
Marengo was Emperor Napoléon Bonaparte's horse, Copenhagen was the Duke of Wellington's horse.