However, the Japanese fleet did not bomb the naval docks and military oil depots at Pearl Harbor as in history, because according to Yamaguchi's operation, it was first necessary to destroy the air defense liliang on Oahu and even on the entire Hawaiian Islands, including airfields and aircraft carriers, as well as anti-aircraft artillery on the ground and on warships, especially large-caliber anti-aircraft guns that could fire close-fire fuse shells, and small-caliber anti-aircraft guns with a shorter range could be put on the ground because the airspace they could control was much smaller. And it is also impossible to reach the enemy aircraft of high-altitude aircraft.

Under such a request, only a little more than a minute later than the attack on the three aircraft carriers, the airfields on Oahu and the air defense positions with large-caliber antiaircraft guns were also attacked by Japanese bombers, and the US forces, which were unable to react, hardly had time to make any decent counterattacks, and the large-caliber antiaircraft guns on the airfields and the ground were all useless under the enemy's fierce air attacks, and at this time, other warships other than the aircraft carriers in the harbor had also been attacked by the Japanese troops.

Since the bombers carried basically high-explosive bombs during the first wave of attacks, the Japanese bomber pilots wisely focused their attacks on the thin-skinned warships below the heavy cruisers, and as for the big guys like the battleships, although the Japanese bombers also dropped some bombs, the purpose was only to destroy the large-caliber anti-aircraft guns on the ships, not to sink these battleships, because high-explosive bombs were difficult to cause fatal damage to the battleships unless the yield was large enough to a certain extent.

However, if the Japanese Navy's marines wanted to land on Oahu, these huge ships had to be sunk. Yamaguchi had been prepared for this, and the Japanese pocket submarines that had already infiltrated the harbor at this time were burdened with such a heavy task, and a considerable number of the bombers in the second wave of attack also carried heavy armor-piercing bombs

The battleship "California" moored at the outermost part of the entire battleship group was first attacked by submarine torpedoes, and the underwater defense and anti-sinking resistance of the battleship "California" with an obsolete hull were obviously inferior to the new battleships that the great powers had entered service in recent years, and after the sidechord was hit by three torpedoes, the battleship "California" quickly sank

The slightly younger battleship West Virginia had a bit of luck, having been hit by only one torpedo during this attack, which was not fatal (pocket submarines could only fire light torpedoes of 450mm caliber), but the watertight compartment was not completely closed because it was not in a state of imminent combat. As a result, seawater continues to pour in. As a result, the hull sank rapidly, but fortunately, the water depth at the anchorage was shallow, and it finally ran aground in the harbor. Although it did not sink completely, the heavily tilted hull and the few remaining personnel completely rendered the giant ship with a standard displacement of more than 30,000 tons completely useless

And the flagship of the US Pacific Fleet, the battleship "Pennsylvania", although it has the largest number of personnel on duty. Unfortunately, it was hit by 4 submarine torpedoes. It had just been hit by a 1.8-ton super-heavy high-explosive aerial bomb. The hull of the ship was already seriously damaged, but as a result, it was wounded and wounded, and after struggling to drive for several hundred meters, it capsized and sank in the harbor

The sister ship of the battleship "Pennsylvania" "Arizona" was the luckiest one. Due to its position, it was not hit by a single torpedo during the attack of a Japanese pocket submarine. But the good fortune did not last long, and the US officers and men who hurriedly boarded the ship finally launched the warship, and the second wave of attack planes sent by the Japanese army had already flown over it

An 800-kilogram armor-piercing bomb dropped by a Type 97 carrier-based attack aircraft at an altitude of more than 3,000 meters (Note 1) impartially smashed into the foredeck of the battleship Arizona, first detonating the black powder magazine of the seaplane catapult and thus the smokeless powder magazine of the main turret. The bridge of the USS Arizona collapsed after the explosion, and a huge hole was blown out in the front of the hull, causing the entire hull to sink and 1,177 officers and men killed, including Captain Fan. Colonel Walkenberg

At this point, the four American battleships in Pearl Harbor were all finished, fortunately, not long ago, a large number of American battleships were transferred to the east coast to prepare for the war against Germany, and one battleship happened to be absent from the harbor at this time, so the number of anchored in the harbor was much less than the eight battleships in history, otherwise the losses would be even more amazing. For Americans, this can be called a blessing in misfortune, but if the Japanese knew about the Pearl Harbor incident in history, they might laugh at themselves with more joy than sorrow, right?

In addition to the 7 capital ships, the two Japanese attack waves also sank 12 other warships below the heavy patrol (excluding small boats with a full load displacement of less than 1,000 tons), and 11 non-combat ships that sank or forced the landing, while all the airfields on Oahu had long been bombed to the point that no planes could take off or land, and all the large-caliber anti-aircraft guns on the ground were all silent. By this time, Oahu's air defense had been almost completely lost, and airfields on other Hawaiian islands had been swept away by Japanese aircraft

"In the case that not a single US plane could take off into the air and the large-caliber anti-aircraft guns did not play any role, they actually lost more than 100 planes, and although low-altitude bombing can avoid radar detection and the accuracy is very high, the threat of small-caliber antiaircraft guns and even antiaircraft machine guns has also increased a lot," Yamaguchi muttered to himself after reading the preliminary battle report. Fortunately, although the losses were large, the most important goal was achieved, which was to clear Oahu and its surrounding air defense Liliang so that the fleet could calmly deal with the fortified fortress groups on Oahu

Although Hawaii has not yet been formally incorporated into the territory of the United States, it has been the main base of the U.S. Navy's Pacific Fleet for a long time, and Oahu, as the main island, has built a large number of fortified forts early, including the same 406mm fortress cannon as the battleship (13 turrets, 2 guns each, a total of 26 guns. It is so powerful that if you don't get rid of them and start landing, it will be tantamount to sending the officers and men of the Marine Corps to death en masse. But the Americans naturally knew the value of these cannons, and specially designed and built extremely strong forts for them, protecting them tightly, with a 6.1-meter-thick layer of earth and rock, 2.44 meters (the baffle above the shell is up to 3.66 meters thick) thick reinforced concrete, and 305 mm thick steel plates (embedded in the reinforced concrete layer) superimposed on the super-strong protection (PS: this is still the weakest defense of the forts, and the protection of the Oahu fortress group far exceeds the requirements of World War II, Let the Japanese also miscalculate once, Yamaguchi was cautious enough, and only estimated according to the information provided by the Germans on the Maginot Line. Even the most powerful battleship cannon on the Shijie today can't do anything, unless you're lucky enough to hit it right through the shelling port of the fortress

Note 1: Since the first wave of attacks had already severely damaged US planes and large-caliber anti-aircraft guns, the second wave of attacks no longer adopted the tactics of ultra-low-altitude penetration, but instead used the method of high-altitude bomb delivery, on the one hand, to avoid the US military's small-caliber close-up anti-aircraft guns, and on the other hand, because only when the bomb was dropped at a sufficient height could the destructive power of armor-piercing aerial bombs on high-protection targets be brought into play. (To be continued......)