Speedway help plz!

Can someone please explain to me how speedway UW groups work? I have the basic idea that the group splits up and clears different areas, but I want to be sure exactly how it works before I try it. So could someone show me the builds and strategy correlated, or show me a link? If so thanks, i've been searching a while for this stuff.

If you had searched you would have found atleast 4 threads detailing A) What the A/Me does B) How the terra's work or C) 2 threads that show you the whole groups work... search is your friend (and don't bother saying you looked, the threads are right there)