3rd/4th Cavalry Regiment is an armoured regiment of the Australian Army, and is third in seniority in the Royal Australian Armoured Corps. The regiment was formed in 1981 through the amalgamation of the 3rd Cavalry Regiment and the 4th Cavalry Regiment. Currently there is only one squadron in existence, 'B' Squadron, which is currently part of the 3rd Brigade and is based in Townsville, Queensland. Recent deployments have included Iraq, Afghanistan and Timor Leste. The unit operates the Bushmaster Protected Mobility Vehicle (PMV).