The picture, by artist Mariusz Kosik, shows Austrian Grenadiers in action at Austerlitz. The battle was fought on the 2nd December 1805. The Battle of Austerlitz, also known as the Battle of the Three Emperors, was one of Napoleon's greatest victories, effectively destroying the Third Coalition against the French Empire.
The Austrian Grenadier battalion pictured faces strong attacks by French line infantry. The Austrian VI/23rd Infantry regiment were ordered to assist, but instead threw down their muskets and fled the field in panic.
For more information, checkout the details page