There are 2 objectives - 1. Intercept the Great Khans at Boulder City. 2. Find the men who tried to kill you. The compass marker leads me to 3 dead Kahn bodies. Earlier in mission I freed two soldiers and all the Kahns attacked me so I was forced to kill them all. Not sure if that messed this quest up as I do not know what to do and will be glad if anyone can help me. Thanks.