However, the first Australian Army personnel to complete an operational jump were members of 54 Battery, &lt;a href="2/4th%20Field%20Regiment%20%28Australia%29"&gt;2/4th Field Regiment&lt;/a&gt;; on 5 September 1943, these artillerymen, with negligible parachute training, jumped with their guns to support US parachute infantry during the Landing at Nadzab.