Previous research on Distributed Mission Training (DMT) has shown that pilots and AWACS Weapons Directors rate DMT as highly effective for training multi-ship, multi-bogey air combat. DMT exercises have also been utilized as opportunities for pilots participating in Flight Lead Upgrade (FLUG) training to gain experience in planning, briefing, leading, and debriefing four-ship missions in an intensive air-to-air threat environment. A four-phase research program to assess the effectiveness of using DMT to augment FLUG training was undertaken in Apr 99 by the Air Force Research Laboratory, Warfighter Training Research Division. First, training records were reviewed to identify four-ship FLUG missions that would most benefit from DMT experience and to establish baseline rates for sorties that were repeated due to non-effective upgrading pilot proficiency. These data indicated that among four-ship training missions, the highest refly rates are for Dissimilar Air Combat Tactics, and Low-Altitude Surface Attack Tactics. Second, a five-day DMT-FLUG protocol was developed targeting these missions. Third, DMT- FLUG training exercises were conducted over a one-year period. During these exercises, upgrading pilots lead several missions of increasing complexity using the Air Force Research Laboratory four-ship DMT testbed located in Mesa, AZ with AWACS weapons controllers participating from AFRL's research facility at Brooks AFB, TX. DMT-FLUG exercises were conducted in Jun, Aug, and Oct 99, and Feb 00. Fourth, transfer to aircraft training was assessed through review of training records and interviews with both upgrading pilots and their instructors. As of 1 Sep 00, eight out of twelve upgrading pilots who participated in DMT-FLUG have successfully completed the FLUG program without any repeated missions, one pilot repeated one mission, two transferred out of fighters, and the remaining pilot is still in training. Performance of pilots and AWACS weapons directors within DMT exercises is discussed with emphasis on identifying the mission tasks that are most appropriate for DMT.