Prince Carl Bernhard of Saxe-Weimar-Eisenach was a distinguished soldier, who, in 1815, after the congress of Vienna, became colonel of a regiment in the service of the king of the Netherlands. He fought at the Battle of Quatre Bras and the Battle of Waterloo where he commanded the 2nd Brigade of the 2nd Dutch Division, and later became a Chief Commander of the Royal Netherlands East Indies Army.

The Battle of Quatre Bras was fought on 16 June 1815, as a preliminary engagement to the decisive Battle of Waterloo that occurred two days later. The battle took place near the strategic crossroads of Quatre Bras and was contested between elements of the Duke of Wellington's Anglo-allied army and the left wing of Napoleon Bonaparte's French Armée du Nord under Marshal Michel Ney. The battle was a tactical victory for Wellington, but because Ney prevented him going to the aid of Blucher's Prussians who were fighting a larger French army under the command of Napoleon Bonaparte at Ligny it was a strategic victory for the French.