Marine Corps Early Warning Detachment, Guadalcanal (1942–43)

The Marine Corps Early Warning Detachment, Guadalcanal (1942–43) was a ground based early-warning radar detachment that provided long range detection and rudimentary fighter direction against Japanese air raids during the Battle of Guadalcanal. Initially deployed as part of the headquarters of Marine Aircraft Group 23, this detachment established an SCR-270 long range radar that allowed the Cactus Air Force to husband its critically short fighter assets during the early stages of the battle when control of the island was still very much in doubt.

Source: Wikipedia — Marine Corps Early Warning Detachment, Guadalcanal (1942–43) (CC BY-SA 4.0)