Eastemnet
The Treason of Saruman #27 (x3)
Location
2 (3)
Plains.  

While Eastemnet is the active location, it gains:"Response: After Eastemnet is explored, add 1 resource to each hero's resource pool."

Travel: Increase the pursuit value by 1.

...the Horse–lords had formerly kept many herds and studs in the Eastemnet, this easterly region of their realm... –The Two Towers