Head to the middle of the East trenches (as indicated by on the map), there you will find an injured cliknar, Hail it and go through its text, Liuetenant Relikk will then come, Hail them and go through their text, you can choose to aid the bixies or the cliknar, if you choose the cliknar you will have to kill the bixies, if you choose the bixies you will have to kill the nest defenders to the east