Okay kiddo, do you know what a sword is? Yes? Great! So the pattern 1796 light cavalry sabre is a type of sword that was used by soldiers in the past, specifically by cavalry soldiers who rode horses.
This type of sword was made in the late 1700s and early 1800s in England and was used by the British army. It is called a light cavalry sabre because it was designed to be lightweight and easy for soldiers to use while riding on horses.
The blade of the sword is about three feet long and is curved, which helped the soldiers to slash and stab at their enemies. The handle is made of wood and has a guard to protect the soldier's hand from getting hurt.
The reason why this sword is special is because it was one of the most popular types of swords used during the Napoleonic Wars which was a big war in Europe a long time ago. Soldiers would use it in battles against other soldiers or against groups of people who were rebelling against their government.
So, in summary, the pattern 1796 light cavalry sabre is a type of sword that was used by soldiers on horses a long time ago. It is important because it was used in a big war and was designed to be easy for soldiers to use while riding on horses.