If you have set up a trade/free info pact then Fringe will probably go to war with all of them (despite the distance) leaving you to fight their battle alone. You then go north about 5 systems, then south east for another 5, all empty until you finally reach the rest of the races - Drakk, Hybrid, Talon and one of the ancients you can't ally with. The only challenge I failed was the 16th (although I didn't do any of the challenges until I had a level 100 operative so that probably helped), the set up is you start with Fringe and Brunt in the bottom left corner, Brunt declares almost immediately and there is a lot of empty space so becoming allies with Fringe is near automatic as almost every quest you complete is for them. Easy '4th Quadrant Saved!' Achievement Guide
