[1][2][3] One of the major activities of the Naval Base Guadalcanal was the support of the building of the airbase Henderson Field.

On 28 July 1942, the US Navy and US Marine did a practice amphibious landing at Naval Base Fiji's Koro Island.

Empire of Japan had built a base at Tulagi, a smaller island just to the north of Guadalcanal.

One of the reasons Guadalcanal was selected for amphibious landing, was on 20 June 1942 the US found Japan had begun building an airbase near Lungga Point.

An airbase on Guadalcanal could attack the sea route from the United States to the US Naval Bases in Australia.

The US Naval would learn from the operation and improved the supply train to the fighting troops in the island hoping campaign.

The Seabees added 1,300-feet to the runway and paved it in Marston mat, due to the poor soil and rain.

[6] The Construction Battalion 26 continued improving the base at Guadalcanal and built: gun mounts and emplacements, tunnels, 6,000 feet of railroad, multiple docks, over 35 miles of primary roadway, 10 bridges and two radio stations with 150-foot transmitter towers.

The US bases built at the Solomon Islands worked to stop the Tokyo Express, the name given to Japan's supply line and reinforces from Rabaul to Guadalcanal.

The US Navy Seabee built Naval Base, and airfields and help in the beach landing.

[12][13] Except for some troops left to build, garrison, operate, and defend the base at Tulagi, however, the majority of the U.S. Marines who had assaulted Tulagi and the nearby islets were soon relocated to Guadalcanal to help defend the airfield, later called Henderson Field by Allied forces, located at Lunga Point.

The floating base depart after defeat in the naval battle of Savo Island in August 1942.