My friends and I were sent on a mission to scout Mars to find anything that the Cabal might be involved in. After we landed on Mars we starting looking around for anything suspicious. Around 3 hours later we found this abandoned city in the whereabouts of Mars. We searched for any intel that might give us a lead of what use to live here or what happened here. After awhile we found this cave with some valuable blueprints locked inside a safe. This safe had a lock that we didn't know the combo to. We tried to shoot it. After awhile somebody came out of a pitch black corner and asked who we were. So we told them we were guardians of the last safe haven on Earth. We were given special powers by The Traveler and are determined to protect Earth and other worlds. The man told us the combo due to his trust in us. Once we opened up the safe we found this book. All of the history of this abandoned city was written in this tiny book. My friends and I then read this book and found out that this city was invaded by the Cabal. It also said where their base is. After we walked outside to invade this base a Cabal drop ship came in and several legionnaires along with a single centurion. After it was just down to the centurion several more drop ships came in. We decided to retreat and come back to finish our mission another day. The Cabal are still in their base. For now.