Some of the most vicious fighting during the "Outpost" war took place in the Nevada Cities. The Marines' defenses there were made even more complex because the enemy held the high ground surrounding them, and each of the three Outposts of was dependent on the other, making it essential to hold them all or face isolation and destruction one by one.
Nevada Cities 
A Marine with disassembled M20 3.5in Rocket Launcher, after after a patrol in the Nevada Cities area, 1953
Marine combat outposts named Reno, Carson and Vegas, called the Nevada Cities, were north of Seoul on three strategic crests near Panmunjom.
Carson was the westernmost outpost, located 800 yards from the Main Line of Resistance (MLR). Reno was situated in the center, farthest from the MLR, about 1,600 yards, and the most difficult to defend because of rough terrain.
Just south of Reno was an area called the Reno Block. Occupied only at night, it was tasked with stopping the enemy if Reno fell.
Vegas, the highest of the outposts, was to the right of Reno and approximately 1,300 yards in front of the MLR. The cities were held by composite platoons of rifle and weapons company personnel.
In " The Final Crucible: Marines in Korea, 1953", Ballenger explains: "The location of the Nevada Cities was a problem. They were surrounded by higher ground held by the enemy, and each one depended on the others for flank defense. If one outpost fell, the others were as vulnerable as a stack of dominos."
