Show notes
Last time we spoke about the landing at Saidor and the drive against Sio. The Australians were still advancing across Shaggy Ridge when General MacArthur unleashed an amphibious assault against Saidor to cut off the Japanese escape and isolate Sio. Numerous features were seized up the large ridge and the Americans successfully amphibiously assaulted Saidor and seized their airfield. General Adachi placed the 51st and 20th divisions under the command of General Nakano, who was tasked with advancing to Gali to try and secure a new supply point. Meanwhile efforts were made to try and contain the new threat in Saidor while simultaneously holding back the Australians in the south. Over on new britain the airdrome was seized as Colonel Katayama launched a failed counter attack against the Marines. The Marines tossed back the attack and began their own advance further inland. This episode is Ledo Road Offensive Welcome to the Pacific War Podcast Week by Week, I am your dutiful host Craig Watson. But, before we start I want to also remind you this podcast is only made possible through the efforts of Kings and Generals over at Youtube. Perhaps you want to learn more about world war two? Kings and Generals have an assortment of episodes on world war two and much more so go give them a look over on Youtube. So please subscribe to Kings and Generals over at Youtube and to continue helping us produce this content please check out www.patreon.com/kingsandgenerals. If you are still hungry for some more history related content, over on my channel, the Pacific War Channel you can find a few videos all the way from the Opium Wars of the 1800’s until the end of the Pacific War in 1945. The Americans had landed at Cape Gloucester, Saidor and were carrying out massive attacks against Rabaul. As we had seen previously, on November 5th, aided by bad weather, a surprise air raid was made by the USS Saratoga and Princeton, led by Rear-Admiral Frederick Sherman that inflicted heavy damage to 4 cruisers within the harbor; Maya’s engine room was smashed by a bomb killing over 70 men; a 500 lb bomb hit Mogami; Takao took 2 500 lb bomb hits while 3 500 lb bombs narrowly missed Atago killing 23 seamen and caused severe damage to the ship’s plating. 2 other cruisers and 3 destroyers also suffered light damage. Captain George Chandler flying a P-38 fighter pilot described how “There were B-24 bombers up high and B-25 bombers attacking right down on the deck dropping ‘frag’ bombs on the airplanes along the runways … we did our best work at high altitude, but we also took part in combat a thousand feet off the ground.” The devastation caused Admiral Miniechi Koga to withdraw his forces to Truk, thus ending the IJN threat to Bougainville. A Japanese naval officer would later admit that they had given up on Bougainville mainly because of “the serious damage received by several Second Fleet cruisers at Rabaul by carrier attack …” The successful raid against Rabaul left Halsey ecstatic. “It is real music to me and opens the stops for a funeral dirge for Tojo’s Rabaul.” On November 8th, reinforcements led by Rear-admiral Alfred Montgomery task force 38, with the new fleet carriers USS Bunker Hill, Essex and Independence. With the added carrier strength on November 11th, a follow up air raid was made seeing the IJN cruiser Agano torpedoed and badly damaged, while 35 Japanese aircraft out of 120 launched in a counter attack against the carrier force were shot down. Montgomery would not lose a single ship. Admiral Koga’s decision to send carrier pilots to bolster Rabaul had quite literally blown up in his face. Koga’s air fleet had lost 43 of its 82 Zeros, 38 of its 34 Vals, 34 of its 40 Kates and 6 Judy spotter planes. Over 86 of his 192 experienced pilots and crew had perished, and he had only inflicted minimal damage to Nimitz fleet, it was a disaster. Yet the fantastical reports from Japanese pilots kept pouring in, claiming the air battles over Bougainville were infact won by the IJN air forces. Newspapers in Japan reported victories that added up to the destruction of 5 American battleships, 10 carriers, 19 cruisers and 7 destroyers. The reality was the destruction of 2 cruisers, the USS Birmingham and Denver. By mid november Vice Admiral Kusaka was finding it difficult to sustain attacks against allied convoys feeding supplies to Empress Augusta Bay. On November 12th, Rabaul only had 113 Zero’s of which only 59 were operational. Crews were suffering from malaria and other diseases, no one was granted rest as they were limited in personnel and under constant attack. The quality of ground crews and pilots was deteriorating every week. From November 12 through December 16, the daytime skies over the Gazelle Peninsula remained relatively quiet, as the US carrier forces had departed to support operations in the Central Pacific. AirSols received a new commander on the November 20th, Major General Ralph Mitchell who continued to support operations in Bougainville and General Kenney’s Fifth Air Force was supporting preparations for the landings in western New Britain. The lull gave Admiral Kusaka a brief opportunity to recuperate as replacements began to arrive from the Marshalls and Truk. The Imperial Japanese Navy would take six months to replenish its carrier pilots with less well-trained and inexperienced replacements. In the meantime the carrier fleet itself, Japan’s most expensive and precious strategic asset, was forced to remain idle in Truk as Nimitz began his island hop through the Central Pacific Meanwhile the Torokina airfield had become crude but operational. The Seabees had created a single 4750 foot by 200 foot strip. It lacked taxiways, hardstands and buildings, but by December 10th it could launch aircraft. Soon the Seabees would carve 2 additional landing trips in the jungle 3 miles further inland. The first would be a mile long, the second 8000 feet or so for bombers. Unlike the Japanese airfields on the Gazelle Peninsula which would take more than a year to complete, both of these American airfields took a month. You often hear, especially from marine veterans of the pacific, praise for the Seabees, such a colossal advantage in logistics paved the way to victory. A massive fighter sweep was launched on December 17 consisting of 32 Corsairs, 24 F6Fs, and 24 RNZAF Kittyhawks from airfields at New Georgia and Vella Lavella who rendezvoused at Torokina, topped off their fuel tanks, and hit Rabaul. The strike was led by Major Greg “Pappy” Boyington, the commanding officer of Marine Fighter Squadron 214, better known by its nickname, the "Black Sheep Squadron". The three types of aircraft had different flying characteristics and different cruising speeds. The Kittyhawks, slowest of the bunch, took off first. The plan was for them to come in at 15,000ft, and lure out the Japanese. Next came the Hellcats, flying above the Kittyhawks. And the last were the Corsairs, who flew top cover. It was a long flight over open water, calculated to make the pilot of a single-engine aircraft nervous. If the engine failed it was a long swim home. They were intercepted by 35 Zeros, with the Kittyhawks getting the first jump on them. After the Kittyhawks made their first pass, shooting down a Japanese fighter, the advantage switched over to the more agile Zeros. The Kittyhawk squadron leader’s plane was fatally damaged and a second Kittyhawk went down after colliding with a Zero. Remarkably, both pilots survived. Meanwhile the Hellcats and Corsairs, at high altitudes, were coming up empty. The Corsairs circled Lakunai field finding no targets. Pilot Boyington exchanged insults with an English-speaking Japanese officer over the radio, but despite his challenges found no targets in the air. When all aircraft returned to base, the score was even. Two Kittyhawks and two Zeros were lost; one each due to the collision and one shot down by both sides. It was a rather disappointing fighter sweep, but would become just one of many against Rabual over the course of the next 3 weeks. The next raid came two days later seeing 48 B-24s launched, but 32 were forced turned back. The remaining 16 bombers escorted by 51 were intercepted by 94 Japanese fighters, yet they also suffered from the bad weather. Less than half made contact with the enemy. In the resulting fight, 5 Zeros were shot down and 10 allied aircraft were lost, but only two were shot down. The other eight were due to a mid-air collision and landing mishaps, all near home. The weather persisted to be so bad, it was only on the 23rd another sortie could be launched. B-24s escorted by Corsairs and Hellcats bombed Lakunai. Radar gave the Japanese some early warning and nearly 100 Zeros were scrambled. 60 made contact with the bombers after they hit Lakunai. No bombers were lost, but 2 Corsairs were shot down in the ensuing dogfights. Yet the Americans had a twist, they followed up the raid with a fighter sweep of 48 Corsairs. They arrived 15 minutes after the bombers left, surprising the airborne Japanese fighters, most of whom lacked radios. 6 Zeros were shot down, several others damaged and only 2 Corsairs lost. 2 days later, another fighter sweep preceded by bombers was launched claiming 18 aircraft kills, but it was probably closer to 5. In comparison the Japanese pilots would claim 55 kills, a number greater than the american force sent. On the 27 another sweep was launched against Cape Gloucester downing 7 Japanese aircraft for one American. 28 Corsairs returned the next day but this time the Japanese held the advantage, sandwiching the Marines between 2 large groups of Zeros. 3 Corsairs were shot down, but so were 3 Zeros, with 2 others badly damaged. On 30th 36 Liberators escorted by 20 Hellcats and 20 Corsairs, bombed Rabaul. 1 B-24 was lost on the raid, hit by antiaircraft fire. No air combat occurred. On New Years day 15 B-24s and 68 escorting fighters met heavy fighter opposition. 40 Zeros had been sent to Rabaul from Truk, manned by veteran pilots. 1 B-24 was shot down, and two others badly damaged. On January 2 48 US fighters raided and on the 3rd another 44. The two sweeps took out a handful of fighters. The last sweep was on the 5th seeing another 2 zeros downed. Meanwhile back on December 24th, Admiral Sherman’s task force 37 raided Kavieng. The operation had two purposes, 1) was to distract attention from the landings at Cape Gloucester and 2) to interdict sea traffic between Truk and Rabaul. The 5000-ton naval transport Tenyru Maru was sunk and several other ships were damaged. After this task force 37 made several raids against Kavieng through January 4th. They managed to shoot down 10 Japanese fighters, damaged IJN cruiser Noshiro and destroyers Fumizuki and Satsuki. On Janaury 6th, the bomber strip at Piva became operational, thus Rabaul was now within range of allied light and medium bombers, basically it was pounding time. On January 7th, 16 Avengers and 24 Dauntless raided Tobera airfield. From medium altitudes the Avengers dropped 2000lb pounds smashing the paved runways. The Japanese managed to shoot down 3 fighters and one dauntless, but Tobera was temporarily not operational. It was the first time any Rabaul airbase was neutralized from bomb damage. This would be followed up on the 11th by a low level attack against Vunakanau by B-25’s, damaging 8 parked aircraft. Then on the 14th, Simpson Harbor was attacked by 16 Avengers , 36 Dauntless and fighter escorts. The Japanese tossed 84 fighters but the allies held such a tight formation it was difficult to get at the bombers. 2 bombers were lost before reaching Lakunai; 1 to a mid-air collision and 1 to antiaircraft fire. When the Allied aircraft finally arrived, clouds shielded Lakunai so the bombers switched to targeting the ships in Simpson Harbor. The Avengers carried 2,000lb bombs, limiting their effectiveness. Regardless, they landed hits on the 15,400-ton-displacement oiler Naruto, and thus ended its goal of becoming the Hokage. . . sorry folks could not resist that one. The destroyer Matsukaze was also damaged alongside 5 other vessels. AirSols came back to hit simpson harbor and blanche bay 3 days later sinking the Komaki Maru, Kosei Maru, Yamayuri Maru, Hakkai Maru and Iwate Maru. To take down the combined 30,000 tons of shipping AirSols lost 8 P-38s, 1 Hellcat, 1 F4U, 1 Avenger, and 1 Dauntless. The rest of January saw so many raids, sometimes 2-3 on the same day, thus I can’t spend the entire podcast listing their actions, but the losses were brutal. For the Americans they would lose 23 aircraft between January 23rd-30th, for the Japanese it was around 37. By the end of the month, Rabaul was being bled dry of planes, thus the rest was withdrawn to Truk with around 40 pilots. To make up for the withdrawal, Admiral Koga brought over the air groups of carriers Junyo, Hiyo and Ryuho on the 25th adding 62 zeros, 18 vals and 18 kates to Admiral Kusakas dwindling forces. Does that not sound like performing the exact same action that saw such devastating losses in late december to early january? Yes, yes it does. Moving over to New Britain, General Shepherd had just smashed the Japanese positions along Suicide Creek. While seizing Suicide Creek some Americans captured a Japanese dispatch saying “It is essential that we conceal the intention that we are maintaining positions on Aogiri Ridge. Concerning the occupation of this position, it is necessary that Aogiri Yama is maintained.” While making arrangements for the Japanese assault against Target Hill one, Lieutenant Abe had occasion sent field dispatches to Warrant Officer Kiyoshi Yamaguchi, one of his platoon leaders. The dispatch mentioned command post locations, hour of attack, and other orders. Yamaguchi, with that seemingly incredible indifference to basic security which the Japanese so often demonstrated, simply stuck the dispatch in his pocket and carried it with him to the assault. Marines found it on his body the following morning, thereby gaining their first inkling of the existence of a terrain feature which appeared as such on none of their maps but upon which the Japanese appeared to place great importance, for reasons not yet clear. Aoigiri Ridge was not in the American maps and it was currently held by the 2nd battalion, 53rd regiment and 2nd battalion, 141st regiment. Behind the ridge was a wide trail leading to Magairapua, connecting Matsuda’s HQ with Borgen Bay. The trail was heavily used and concealed extremely well from American aircraft. Back over at the American lines, by January 5th, the 3rd battalion, 7th marines had pulled back into the reserve, allowing the weapons company, 7th marines to occupy the extreme left along the shore to prepare for Shepherds offensive against Hill 150. The new formation launched their attack at 11am on the 6th. Tanks surged forward to smash a roadblock held by the 2nd battalion, 141st regiment on the left trail. Artillery was deployed on a nearby hill hitting the Japanese lines as A company tried to break through but was quickly pinned down by the roadblock. The tanks eventually burst through the roadblock sending the Japanese packing. The americans advanced through the increasingly swampy terrain, facing weaker resistance. B company crossed a small stream and stormed Hill 150 during the afternoon, securing it. Further right, C company and the 3rd battalion, 5th marines were surprised to be held up by extremely heavy fire from the until then unknown feature, Aogiri ridge. The men had no other choice than to pull back to a safe distance to dig in as they reported back the presence of the heavily fortified position. The Japanese would unleash carnage upon the men for 2 days whenever they tried to press forward. On the 7th the commanding officer of the 3rd battalion, 5th Marines, was wounded and replaced by Lt Colonel Lewis Walt. The next day, Walk’s men were cautiously inching forward under heavy enemy f…
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