Complex sentence: Australia is not a NATO nation but worked closely with Dutch forces, deploying a Reconstruction Task Force based around the 1st Combat Engineer Regiment with protective elements from the 5th/7th Battalion, Royal Australian Regiment, 6th Battalion, Royal Australian Regiment and 2nd Cavalry Regiment.
Split into simpler sentences: Australia is not a NATO nation but worked closely with Dutch forces. A Reconstruction Task force based around the 1st Combat Engineer Regiment with protective elements from the 5th/7th Battalion, Royal Australian Regiment, 6th Battalion, Royal Australian Regiment and 2nd Cavalry Regiment.