 In some representations (Roman coinage) Tranquillitas is depicted holding a hasta pura, a ceremonial lance (spear), the forerunner of the standard pilum issued to Roman soldiers, a reference to tranquility enforced/provided by the Roman military machine; or perhaps suggest a tranquil period for the Roman Armies which had been involved in frequent civil wars.In the other hand Tranquillitas holds some sort of animal in her outstretched hand.Most experts believe to be a Roman Dragon ("draco"), a symbol associated with the military ensigns (banners) all of the Roman Legionary Armies during the period of the Empire, as well as by the Dacians and the Parthians.