[1] The regiment transferred its allegiance to King William III in February 1689 and fought the depleted forces of James II in Scotland later that year.

[2] The regiment saw action at the Battle of Steenkerque, where it suffered heavy losses, in August 1692 and at the Siege of Namur in July 1695 during the Nine Years' War.

[2] The regiment next saw action, as part of the light brigade under the command of Major General the Earl of Cardigan, at the Battle of Alma in September 1854.

[4] Private Samuel Parkes was awarded the Victoria Cross during the charge for saving the life of a Trumpeter, Hugh Crawford.

[1] The regiment was posted to the Middle East arriving on 31 December 1940[8] and as part of the 1st Armoured Brigade in the 6th Australian Infantry Division fought in the Greek Campaign.

[2] As the rearguard in the Corinth Canal Bridge action the regiment was overrun and surrendered en masse, losing all senior officers and over 400 men as prisoners of war.

[2] After the Second World War, the 4th Hussars deployed to Lübeck in Germany in March 1947 from where the regiment was sent to serve in the Federation of Malaya in September 1948.