A vicious battle

I only remember parts of this dream, but believe that the parts I have remembered are significant in some way.

From what I can remember, the dream started with me in a desert. I was with 6 other people who were all stood around in a circle. They wanted me to join them, but I wanted to just lie in the sand and look up at the sky instead. It was sunset and even though this was a desert, the horizon was lined with trees. There were also little grassy islands in the distance.

The dream then switched to later that evening, only this time the desert was no more and everything was grassy, almost like a park. In the distance I could now see a large tower. There was another person with me, a large black guy who looked a bit like the rapper Immortal Technique. He was running ahead, urging me to go with him to the tower. I asked why we were going there and he said there was a battle and we needed to be in on it. I ran along with him, but pointed out that we had no weapons. He then told me we didn't need any, and I was left wondering how we were meant to fight unarmed.

We eventually reached the foot of the tower. The entrance had been covered up with some sort of barricade and other people I assumed to be fighters were pushing past the barricade and making their way inside. I noticed they were all armed, but every single one of them dropped down dead as soon as they stepped inside. My companion then told me this was the reason we didn't need any weapons, and that we could pick some up once we'd got inside.

The dream switched again to the battle proper, which took place in what looked like a warehouse. I was now partnered with a woman called Tracy, who ran straight into the fight. It was a vicious battle with lots of gunfire and explosions. At this point, I was an observer rather than a participant, then it suddenly ended. There were few survivors and the woman I was with was missing. I presumed she was dead but female detective who'd suddenly showed up said that she knew this Tracy had gone AWOL. I was stood with the detective on a platform that overlooked a street. I peered over the railing at the edge of the platform and found myself looking down an alleyway lined with tenements. The dream ended here.