The 3rd/4th Cavalry Regiment is an armoured unit within the Australian Army's Royal Australian Armoured Corps. Formed in 1981 with the amalgamation of the 3rd Cavalry Regiment and the 4th Cavalry Regiment, from 1986 to 2014 the unit consisted of an independent squadron, B Squadron 3rd/4th Cavalry Regiment, within the 3rd Brigade in Townsville, Queensland. From 2017, B Squadron 3rd/4th Cavalry Regiment has been the training support and logistics squadron within the School of Armour at Puckapunyal in Victoria.

The Royal Australian Armoured Corps (RAAC) is an administrative corps of the Australian Army. It provides the Australian Defence Force's Armour capability, which performs the function of mounted combat. Armour combines firepower, mobility, protection and networked situational awareness to generate shock action and overmatch in close combat. Armour is an essential element of the combined arms approach that is employed by the Australian Army.