ROFL - ok in level 4, get the the part where the guys attack in the hover cars in the tunnel. Leave the game on for 2 hours, then come back. You will ie once, but you have to space to respawn. There will be a screen FULL of guys when you get back. omfglmfao!
Wow, this isnt hard at all. You can counter an attack of 100 with 1. Shoot from the one being attacked, toward the attacker. I beat every level on the first try with this techinque. Also, instead of sending half your units to attack neutral zones, send all from one. Expand to neutrals as fast as possible, you dont need to worry about being spread thin, just counter when your attacked.
 "Brute Wars"){kind=icon}
 "Gangsta Wars"){kind=icon}
 "intrusion"){kind=icon}
 "Protector: Reclaiming the Throne"){kind=icon}
 "Elite Forces:Conquest"){kind=icon}
 "Kongai"){kind=icon}
 "The Last Stand 2"){kind=icon}
 "Music Catch"){kind=icon}
 "Nano War"){kind=icon}
 "Areas"){kind=icon}
 "Castle Crashing \"The Beard\""){kind=icon}