Hussars as a single troop first appeared in Britain after 1805, when four dragoon regiments, namely the 7th, 10th, 15th and 18th, were reorganized into hussars.
Their establishment in the British army was caused mainly by the existence of similar regiments in all the other European armies, rather than for any tactical reasons.
In spite of that, the 1st Arenschild's Hussars regiment, made up mostly of German soldiers, was considered to be the best mounted formation for outpost military service.
Basically, hussars dealt with mounted reconnaissance. Used in battles for infantry and cavalry support, hussars were equipped with sabers and musketoons.
The preferred firing position for these cavaliers was beyond the enemy's bayonets, the middle distance. Hussars mastered swordsmanship with the saber quite well, favoring accurate piercing strikes to chopping blows.