The period in Parthian history between Mithradates II and Phraates 111 is one about which very little is known. Events in West Asia were in turmoil with Rome's involvement becoming ever larger, but Parthia took little or no part in the wars between Rome and the allies, Pontus and Armenia. The reason for Parthia's inactivity can only be guessed. After a summary of recent developments in the understanding of early Parthian history we will give a reconstruction of events in Parthia and her non-involvement in West Asian affairs between 90 and 70 B.C. This is only one combination of possible explanations for the several problems.