Dominion

The Dominion are an evil race from Star Trek. They are based in the Gamma Quadrant.

The Dominion are something like Israel. It was founded thousands of years ago by shapeshifters who had been persecuted and killed by other races. In time, the shapeshifters built a vast empire by exerting their will on other species. Their military, the Jem'Hadar, were undefeated before they fought the Federation.