I just bought Dawn of War II and it's a fantastic game.
Me and my two friends was playing a 3v3 match and we were losing, they had 80% of the resources and we were losing slowly. We were all playing Defensive Imperial Guard and decided to block all entrances to our base with walls and set up turrets and bunkers. We made a huge line with a mix of Guardsmen and Storm Troopers with Sentinels behind us. We managed to hold 2x Tyranids and 1x Orks for 9 minutes. Orks massed standard units and put them in transport vehicles, managed to get those vehicles behind the walls and deployed the troops there. Because of that our wall was weakened and a lot of Guardsmen died (R.I.P.) and out of nowhere thousands of Nids attacked the wall and it was GG.
[Edited on 12.21.2012 4:00 PM PST]