The high-side angle gave him access to surfaces a pure tail chase did not.
The .50-caliber Browning was powerful enough to damage engines, penetrate structure, and ignite fuel if rounds hit useful locations.
His short bursts therefore produced disproportionate effects.
One burst could disable an engine.
Another could start a fuel fire.
A bomber that remained airborne might still be forced to leave formation.
That was enough.
The objective was not necessarily to create spectacular explosions.
It was to prevent bomb delivery.
O’Hare attacked the formation as a system
This is one of the most useful ways to understand the fight.
A bomber formation gains strength from organization.
Aircraft stay together.
Defensive fields of fire overlap.
Bombing runs are coordinated.
Navigators and leaders maintain heading.
Wingmen follow.
If a fighter damages one aircraft on the edge, a gap appears.
If another falls behind, defensive coverage changes.
If a leader is hit, formation control may suffer.
If another bomber jettisons its bombs, the group loses striking power.
By moving from target to target, O’Hare attacked those connections.
He did not need to destroy every aircraft physically.
He needed to make the formation stop functioning as the formation that had left Rabaul.
By the time the surviving Bettys reached Lexington, that process was already well advanced.
The Japanese crews were not passive victims
It is important not to tell the battle as though O’Hare was shooting at defenseless targets.
The G4M crews were trained naval aviators.
They maintained their attack despite severe losses.
Their gunners fired continuously at the Wildcat.
Damaged aircraft attempted to recover.
One crew extinguished a fire and rejoined the formation.
Others continued even after seeing neighboring bombers fall.
The surviving aircraft still reached bomb-release position.
This resistance is essential to understanding O’Hare’s achievement.
Aerial combat becomes meaningless if the opponent is described merely as a row of targets.
The Japanese formation continued trying to complete its mission until the end.
O’Hare succeeded against crews that were actively fighting back.
The attack revealed strengths and weaknesses in both aircraft
The Wildcat and G4M had been designed for different purposes.
The F4F was a short-range carrier fighter.
It needed acceleration, maneuverability, firepower, structural strength, and the ability to operate from a ship.
The G4M was a long-range land-based naval strike aircraft.
It sacrificed some protection to achieve exceptional operational reach.
On February 20, their design philosophies collided.
O’Hare used the Wildcat’s small size, diving speed, concentrated forward firepower, and maneuverability.
The Japanese used the G4M’s range, formation defense, multi-crew operation, and rear armament.
The outcome did not prove one aircraft categorically superior.
It demonstrated what happens when an experienced shooter finds the correct tactical geometry against a formation whose mission limits its maneuvering freedom.
Radar was the invisible participant in the fight
Without radar, O’Hare might never have been in position.
A visual lookout aboard Lexington could see aircraft only at relatively limited distance depending on altitude, light, and weather.
Radar extended the carrier’s awareness.
The second formation was detected while still outside immediate bombing range.
The warning was short, but it existed.
That allowed the fighter-direction system to send O’Hare and Dufilho toward the incoming aircraft.
Early American carrier radar was crude compared with later systems.
Contacts could disappear.
Operators could misestimate formation size.
Communications between radar plots, fighter directors, and pilots were still being refined.
Yet even an imperfect warning was transformative.
A fighter already airborne could move nine or ten miles quickly.
A fighter sitting on the flight deck could not.
The February 20 battle demonstrated one of the central developments of Pacific carrier warfare: the carrier no longer defended itself only with guns visible from the deck.
It increasingly defended itself with information.
Fighter direction would become as important as fighter performance
The Pacific War is often told through famous aircraft.
Zero.
Wildcat.
Hellcat.
Corsair.
But the aircraft operated inside systems.
Radar detected threats.
Combat-information personnel interpreted them.
Fighter directors decided which patrol to send.
Radios transmitted headings.
Pilots intercepted.
Antiaircraft batteries formed the inner layer.
This layered defense became more sophisticated throughout the war.
By 1944 and 1945, American carrier task forces could detect raids far away, vector large fighter groups toward them, and create multiple interception zones.
In February 1942, that system was still young.
The second formation came dangerously close partly because American fighters had been distributed against the first wave.
O’Hare’s individual action temporarily compensated for the system’s limited maturity.
Later doctrine would try to ensure that no carrier ever depended on one fighter in this way again.
The Japanese had found the American force at the right time
From the Japanese perspective, the opportunity was significant.
Lexington had approached within long-range bomber reach of Rabaul.
The carrier’s planned offensive had been compromised.
The Japanese reconnaissance aircraft had accomplished its mission before being destroyed.
Rabaul’s bomber units now had a rare chance to attack an American fleet carrier far from major American air bases.
Carrier destruction would have been an enormous strategic success.
The Japanese had already demonstrated at Pearl Harbor how destructive naval aviation could be against concentrated warships.
Sinking or badly damaging Lexington in February would further reduce American offensive capability.
Even if the bomber crews knew they faced fighters, the target justified the risk.
That is why both Japanese groups continued toward the task force despite the destruction of aircraft ahead of them.
Lexington was more than a flight deck
USS Lexington had begun life in a very different form.
Originally conceived as a battlecruiser, she was converted during construction into an aircraft carrier after naval treaty changes.
The result was an enormous ship.
By 1942, she was one of the central instruments of American naval aviation.
Her size allowed her to carry a substantial air group.
Her speed allowed her to operate with fleet forces.
But large size did not make a carrier invulnerable.
Aircraft carriers carried aviation gasoline, bombs, torpedoes, ammunition, and large numbers of fueled aircraft.
Damage-control systems could contain many hits, but fires could become catastrophic.
The later fate of Lexington would demonstrate exactly that.
Less than three months after O’Hare defended her, she would be lost at the Battle of the Coral Sea.
Japanese carrier aircraft hit the ship on May 8, 1942.
Although the initial damage appeared controllable, internal explosions and fires eventually forced abandonment. (Lịch Sử Hải Quân)
That later loss makes the February attack especially revealing.
The danger O’Hare faced was not hypothetical.
Lexington could be disabled by air attack.
A bomb did not need to sink Lexington immediately to alter the war
This is why the “what if” surrounding February 20 should be understood carefully.
It is impossible to prove exactly what would have happened if O’Hare had not intercepted the second formation.
Not every Japanese bomb would suddenly have hit.
The carrier still had antiaircraft guns.
It still maneuvered.
Other fighters might eventually have returned.
But an intact second formation would have placed more bombs over the carrier under less disruption.
One direct hit could have damaged the flight deck.
Another might have affected machinery or aviation facilities.
Even temporary loss of Lexington could alter operations during the crucial months before Coral Sea and Midway.
A carrier does not have to sink to disappear from strategic calculations.
Repair time matters.
Aircraft availability matters.
Crew casualties matter.
The United States had very few substitutes.
O’Hare’s success therefore bought something that cannot be measured simply in Japanese aircraft destroyed.
It bought probability.
He made a damaging hit on Lexington less likely.
Captain Frederick Sherman reduced O’Hare’s initial claim
After combat, pilots were debriefed.
Victory claims were compared.
Shipboard observers reported what they had seen.
The process was imperfect but necessary.
O’Hare believed he had destroyed six bombers and damaged another.
Captain Frederick Sherman, commanding Lexington, reduced the credited total to five destroyed.
Part of the reasoning involved the number of aircraft believed to have reached the carrier.
If nine had begun the attack and four survived to bomb, then five appeared to have been eliminated. (Lịch Sử Hải Quân)
The logic was reasonable using wartime information.
The hidden error was the original formation count.
If there were only eight, then the arithmetic changed.
This is an excellent example of why historians must distinguish contemporary documentation from later reconstruction.
Sherman was not falsifying anything.
He was trying to make a conservative assessment.
The underlying information simply remained incomplete.
Jimmy Thach had seen enough to understand what O’Hare had done
Thach was one of the people best qualified to judge the action.
He knew O’Hare’s abilities before the war.
He understood fighter geometry.
He understood how difficult the bomber formation was to attack.
He also had direct experience fighting Japanese aircraft that day.
Thach later described O’Hare as an unusually talented pilot.
He had already watched him defeat experienced squadron pilots in training.
Now the same qualities had appeared in combat.
That continuity matters.
O’Hare’s February 20 performance was not an inexplicable transformation produced by adrenaline.
Combat exposed skills that had already been visible during training.
The difference was consequence.
A missed burst in training meant nothing.
A missed burst on February 20 meant another bomber continued toward Lexington.
O’Hare’s calm became part of his reputation
The public image created around O’Hare emphasized courage, and understandably so.
But courage alone cannot explain the engagement.
An extremely brave pilot could attack from the wrong direction, waste his ammunition, and be killed by a tail gunner.
O’Hare’s success depended on composure.