Cruise San Andreas in any car you've chosen. Use your gang's vehicles, which are parked in your home garage, or steal one from traffic.
Look at your mini map for color changes. Your gang color is green. If an area is highlighted by pink, purple or another gang color, enter this territory.
Aim your weapon out the window of your car when you spot rival gang members. They're often seen wearing their colors walking the streets in different territories. Shoot them.
Shoot as many gang members in the territory as you can. After you cause enough of a scene as a rival gang member in rival territory, you'll be notified that you've started a turf war.
Beat the clock and kill as many gang members with your posse to eliminate the rival gang from the area. The color over the territory will change to green once you've achieved this.
