Use the Horde Siege Tank to destroy 100 Scourge Soldiers and rescue 3 Injured Warsong Soldiers on the Plains of Nasam. You must also discover the identity of the leader of the Scourge assault. Report to Garrosh Hellscream at Warsong Hold should you succeed.
100x Scourge Unit obliterated
3x Injured Warsong Soldier rescued
Once you're ready, jump into one of the tanks and drive it out to the Plains of Nasam, southeast of here.
Use the tank's weapon arsenal to take down the Scourge army. If you get in a jam, the "Meatpounder" will tear 'em up and the land mines will finish 'em off! If you find any of our soldiers, grab 'em! One last thing, fuel tanks can be found all over the field.
Try to get close enough to that structure in the center and see what's going on.
If you do all of this and live, go to Hellscream!