It's an image of the statue at Lion's Mound, which is a memorial in Waterloo (Belgium) located on the battlefield of Waterloo. The location of the mound is said to be on the place that William II was hit by a musket ball on his shoulder during the battle.

The lion itself is based on an ancient statue known as the Medici Lion (actually it's a pair known as the Medici Lions, however only one is ancient) which has been frequently reproduced all over Europe. In this case the lion is being used to represent the Dutch monarch, as their coat of arms depicts a heraldic lion, and the sphere under the lions paw represents global victory.

G. Glover, Waterloo, Myth and Reality (Pen and Sword, 2014)

Glover discusses the battlefield today in chapter 27, however he doesn't go into the symbolism of the lion itself.

That is Lion's Mound or Lion's Hill, the monument erected at the site of the battle.