Looking back at the attack on Pearl Harbor, it’s evident that mistakes were made on both sides. While the United States is believed to have made the gravest by not being prepared for the Japanese assault, it’s also worth noting that Japan’s miscues were equally detrimental. For all practical purposes, the attack on Pearl Harbor was largely incomplete. Over the course of two attack waves, during which the Japanese suffered minimal losses, it initially seemed like the Imperial Navy had delivered a fatal blow to the US Navy.

The fact is, it wasn’t enough of a strike, and even as the Japanese retreated from their allegedly successful assault on Pearl Harbor, there was much more that could have been done.

Why? Why did Japan make the impossible journey across the Pacific and risk a large fleet for an attack that was arguably incomplete? It was all about what the Japanese perceived to be an important part of the US Navy, though that belief ultimately led to ignoring multiple vital targets around the harbor and giving the US a fighting chance in World War II.

An Incomplete Strike

As the Japanese planes set off to return to their carriers, after exhausting their torpedoes and bombs, they left behind a naval base engulfed in smoke and flames. Their mission seemed to be fully accomplished.

Even though much of Pearl Harbor was still intact, the Japanese felt confident that their strike on the primary targets—the battleships lined up at Battleship Row—was effective. Unbeknownst to them, however, the US Navy wouldn’t go down so easily, especially with so many vital resources still available.

Pearl Harbor Fuel Reserves

Oil storage tanks at Pearl Harbor

The Japanese didn’t finish off Pearl Harbor because of a lack of resources and insight. Most of the American battleships were taking on water and were heavily damaged, but access to dry docks at the harbor proved to be incredibly useful in bringing most of the salvageable mighty vessels back into action.

Japan also didn’t completely decimate Pearl Harbor because it didn’t have the right targets in mind. While the battleships were vital to the American Navy, so, too, were the other resources nearby. Fueling stations, oil facilities, drydocks, and other important reservoirs and buildings were largely untouched. Because they still stood, the United States had the ability to repair its damaged vessels easily; the first of the Pearl Harbor battleships was put back into service just months later.

Operation K

President Theodore Roosevelt High School, Oahu Hawaii

Realizing that Pearl Harbor was still a functioning unit in the US Navy, Japan intended on disrupting repairs in another attack in March of 1942. The scheduled assault was undertaken by two Kawanishi H8K “Emily” Flying Boats, and though they made the lengthy—and record setting—journey across the Pacific to their target, the small attack was unsuccessful. Despite minimal damage to nearby Roosevelt High School, the H8Ks failed to do any damage.

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