Key Facts
- Dates
- 28 June – 1 July 1943
- Duration
- 4 days
- US forces
- Marine Raider battalion elements + Army infantry company
- Air support
- US airstrikes supported the assault
- Post-battle use
- Harbor used for US operations; PT boat base plans canceled
Strategic Narrative Overview
Beginning on 28 June 1943, elements of a Marine Raider battalion conducted an overland advance toward Viru Harbor rather than a direct amphibious assault, supported by a US Army infantry company and American airstrikes. The Marines executed an enveloping attack against Japanese defenders positioned around the harbor. Faced with this flanking pressure and aerial bombardment, the Japanese garrison withdrew, and US forces secured the harbor by 1 July 1943.
01 / The Origins
As part of the broader Allied effort to drive Japan from the Solomon Islands and neutralize the major base at Rabaul, American forces launched the New Georgia campaign in mid-1943. Viru Harbor, on the southern coast of New Georgia, was targeted early in the campaign as a potential PT boat base and logistical support point. Its capture was assigned to Marine Raiders and Army infantry operating in coordination.
03 / The Outcome
With Japanese forces driven off, Viru Harbor passed into American hands and was subsequently used to support further US operations in the New Georgia campaign. Plans to establish a PT boat base at the site were ultimately abandoned after the harbor proved unsuitable for that purpose. The action demonstrated the effectiveness of overland Marine Raider tactics in the difficult jungle terrain of the Solomon Islands.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Side B
1 belligerent
Kinetic Engagement Axis
Scroll horizontally to view full axis. Events plotted relatively.