This can be a tricky achievement if you are not used to or good at flying games. The first part should not be too hard, just get the air base secure and land there often to replenish your health. The second part can be tricky. What most people dont realize is you have to take down most of the UAV's first. Once there are only a couple left just unload on the TRGT and you will kill it. I used F-15 swithching between the homming ground missiles and homming air missiles depending on what I was shooting.