The outfit was a small group of surivors from Stargate Command. Their hq in Cheyenne Mountain- had been taken over and General Hammond was now dead. At first they did not notice that he had been replaced by a Kromagg. Many others had been replaced on the base. The group was now being led by Colonel Sam Carter. They had taken with them a very special alien mirror, one which could show you and even take you to different parallel realities. Many of them had indicated their worlds were being invaded by these Kromaggs or other parallel universe versions of them.