The Horde Needs Thick Leather!:

Bring 10 Thick Leather to Sergeant Umala at the Valley of Spirits in Orgrimmar.

Sergeant Umala: I'm glad that you decided to speak to me about this, priest. It looks like the Horde's preparations for the upcoming Ahn'Qiraj War are in full swing. But you and I still need to do our part.

I've been asked to collect a great number of thick leather skins for use in all manner of war materiel, and I need you to help me by going out there and gathering them up. There's honor and the gratitude of the Horde in it for you should you decide to help. Will you?

Sergeant Umala: Much as I hate to admit it, that gnome team they have out there is pretty good. Our boys need every edge they can get.

Sergeant Umala: Now, let me just get a copy of these blueprints for my own notes and you can bring these straight to Pozzik. Wouldn't want him to think that one of his sponsors was abandoning him.