Battle of the Coral Sea

Battle of the Coral Sea
Unknown authorUnknown author · Public domain · source
Conflict	Battle of the Coral Sea
Partof	Pacific Theater of World War II
Date	4–8 May 1942
Place	Coral Sea, off the coast of Queensland, Australia and New Guinea
Result	Strategic Allied victory; tactical Japanese sinking of more tonnage
Combatant1	United States Navy and Royal Australian Navy
Combatant2	Empire of Japan Imperial Japanese Navy
Commander1	Frank J. Fletcher, Norman C. Gilmore (task force commanders); Herbert F. Leary (staff)
Commander2	Chuichi Nagumo, Shigeyoshi Inoue
Strength1	Task forces centered on aircraft carriers USS Lexington (CV-2), USS Yorktown (CV-5), cruiser and destroyer escorts, United States Army Air Forces elements
Strength2	Carrier strike force centered on Shōkaku (carrier), Zuikaku (carrier), light carrier Ryūjō (carrier); cruiser and destroyer escorts
Casualties1	Ships: one carrier lost (Lexington); aircraft and personnel losses
Casualties2	Ships: one light carrier heavily damaged (Shōhō); aircraft and personnel losses

Battle of the Coral Sea

The Battle of the Coral Sea was a major naval engagement in the Pacific War during World War II fought from 4 to 8 May 1942 between forces of the United States and Australia against the Empire of Japan. It was the first fleet action in which opposing ships never sighted or fired directly on each other, with aerial striking forces from aircraft carriers determining the outcome. The battle thwarted a Japanese seaborne assault on Port Moresby and altered operational plans preceding the Battle of Midway.

Background

In early 1942, strategic initiatives by the Imperial Japanese Navy sought to secure a defensive perimeter after the Attack on Pearl Harbor and successful campaigns in the Philippines, Dutch East Indies, and Guadalcanal-adjacent waters. Japanese planners under the Imperial General Headquarters and commanders such as Isoroku Yamamoto and Chuichi Nagumo conceived Operation MO to seize Port Moresby on New Guinea and isolate Australia from Allied lines. Allied intelligence successes, including signals intercepts by Station HYPO and FRUMEL, and contributions from Royal Australian Navy reconnaissance and New Guinea coastwatchers, warned Admiral Ernest King and Admiral Chester W. Nimitz of the looming threat. Task forces under Frank J. Fletcher and carrier commanders coordinated with Admiral Arthur S. "Chips" Carpender and General Douglas MacArthur's Southwest Pacific Area to contest the Japanese advance.

Opposing forces

The Allied strike group combined United States Pacific Fleet carrier task forces centered on USS Lexington (CV-2) and USS Yorktown (CV-5), supported by cruisers such as USS Astoria (CA-34) and destroyers from Task Force 11 and Task Force 17. Aircraft components included Grumman F4F Wildcat fighters, Douglas SBD Dauntless dive bombers, and Douglas TBD Devastator torpedo bombers from United States Navy and United States Army Air Forces squadrons. The Japanese order of battle featured carriers Shōkaku (carrier), Zuikaku (carrier), and light carrier Shōhō (carrier), screened by cruisers from Kongo-class battleship escorts and destroyer divisions under Shigeyoshi Inoue and Takeo Kurita-affiliated commanders. Both sides deployed seaplane tenders, fleet oilers, and reconnaissance aircraft including the Aichi E13A and Nakajima B5N.

Course of the battle

Initial engagements began with Allied reconnaissance by USS Yorktown (CV-5) aircraft locating elements of the Japanese invasion convoy and the Japanese sinking of Allied aircraft in the vicinity of Tulagi and Guadalcanal-area waters. On 4 May Allied carrier aircraft attacked Shōhō (carrier), with coordinated strikes by Douglas SBD Dauntless and TBD Devastator squadrons resulting in her sinking, while Japanese air groups counterstruck and damaged cruisers and destroyers. From 7–8 May the principal clash occurred as opposing carrier groups launched multiple waves of aircraft; USS Lexington (CV-2) and USS Yorktown (CV-5) struck Shōkaku (carrier), inflicting severe damage, while Japanese torpedo and dive bombers fatally damaged USS Lexington (CV-2) and forced scuttling by accompanying destroyers after catastrophic fires and internal explosions. USS Yorktown (CV-5) sustained damage but remained operational. Aerial combat involved intense dogfights between Grumman F4F Wildcat and Japanese Mitsubishi A6M Zero fighters, and anti-ship attacks by Nakajima B5N and Aichi D3A bombers. Nighttime destroyer and cruiser maneuvers and aerial reconnaissance continued until both sides withdrew.

Aftermath and significance

Tactically, the Japanese lost Shōhō (carrier) and sustained heavy aircraft and aircrew losses, while Allies lost USS Lexington (CV-2) and numerous aircraft; Shōkaku (carrier) was too damaged to participate in later operations and Zuikaku (carrier) lost many aircrews, reducing Japanese carrier strength for the decisive clash at Midway Atoll. Strategically, the battle stopped the seaborne threat to Port Moresby, preserving Allied lines of communication to Australia and enabling subsequent Allied offensives in the Solomon Islands campaign. Command decisions by Frank J. Fletcher, Japanese leaders including Chuichi Nagumo, and intelligence work by Station CAST and Fleet Radio Unit Melbourne influenced follow-on operations. The engagement demonstrated the primacy of carrier aviation highlighted earlier at Battle of the Philippine Sea precursor debates and informed doctrine revisited by navies worldwide.

Casualties and losses

Allied losses included the loss of USS Lexington (CV-2), dozens of aircraft, and several hundred aircrew and sailors killed, wounded, or missing. Japanese losses comprised the sinking of Shōhō (carrier), damage to Shōkaku (carrier), heavy attrition of carrier air groups aboard Zuikaku (carrier), and significant aircraft and aircrew casualties. Both sides recorded losses among cruisers and destroyers from aerial attack and cruiser action; medical and personnel records were maintained by United States Navy Bureau of Medicine and Surgery and Imperial Japanese Navy Medical Service branches.

Strategic and tactical analysis

Analysts cite the engagement as the first carrier-versus-carrier battle, underscoring the shift from surface gun engagements typified by Battle of Jutland-era thinking to carrier-centric warfare exemplified later at Battle of Midway and Battle of the Philippine Sea. Tactical factors included reconnaissance effectiveness by PBY Catalina and carrier scout plane operations, the impact of combat air patrols flown by Grumman F4F Wildcat pilots, and the vulnerability of carriers to coordinated dive bomber and torpedo attacks such as those by Douglas SBD Dauntless and Nakajima B5N. Intelligence and cryptanalysis by OP-20-G and allied codebreaking units influenced fleet dispositions, while logistical constraints, fuel considerations, and damage control practices affected survivability as debated in post-battle inquiries by United States Navy and Imperial Japanese Navy staffs. The outcome reshaped Pacific naval strategy, contributing to Allied momentum culminating in the Guadalcanal Campaign and the strategic turning point at Midway Atoll.

Category:Battles and operations of World War II Category:1942 in Australia