The 6th Bomb Group

Types of Missions

In General

The members of the 6th Bomb Group flew several different kinds of missions:

Precision Bombing
Area Bombing
Aerial Mining
Tactical Support
Fighter Escort
Search and Rescue (Super-Dumbo)
POW Supply

The B-29 was used on other missions, as well, including:

Weather reconnaissance
Photo reconnaissance
Leaflet drops

A Change in Philosophy

The B-29 was designed primarily for use in bombing missions.  In Europe, the US and the UK adopted differing, but complementary, approaches towards bombing missions.  The US decided to focus on daylight precision bombing, while the UK decided to focus on night area bombing.

The UK had originally tried daylight precision bombing, but suffered huge casualties to enemy aircraft and antiaircraft fire. As a result, they were forced to switch to a tactic of night area bombing. At the same time, the UK (and Germany) began to view such missions as serving a legitimate military objective of shortening the war by demoralizing and "dehousing" the civilian population.

In contrast, the US decided to pursue the strategy of using daylight missions to hit military targets and made every effort to minimize civilian casualties.  One reason the US felt that they could succeed was because of the difference in aircraft. The UK used bombers that had weak defensive armament, but could carry large bomb loads. The US used the B-17 "the flying fortress", which was only a medium bomber, but had a lot of defensive armament. Nevertheless, the US still suffered significant casualties. Over time, a number of changes were made which improved the survival rate: better formations were adopted, missions were flown from higher altitudes (using the Norden bombsight), and long-range fighter escorts became available. However these changes were not pleasant.  The B-17 was not originally designed for high-altitude operations. The waist gunners stood in open windows and the whole crew had wear oxygen masks and bundle up for the winter missions where they were operating in Artic conditions.

The B-29 was specifically designed to avoid these shortcomings. The entire aircraft was pressurized and enclosed. At the same time, the aircraft carried a bomb load that was equivalent to that of the heavy bombers. In addition, the planners knew that the aircraft would be used in the Pacific and demanded a long range aircraft. By and large, the B-29 met these objectives.

However, even while the B-29 was being designed and built, the US was considering changing the strategy to that of area bombing. The military was designing new and improved incendiary bombs specifically for the purpose of burning down Japanese housing. And the military intended to use the B-29 for that purpose.  There were a couple of reasons why this approach made particular sense in Japan.  First, the Japanese cities were made of wood and were particularly vulnerable to fire. Second, in contrast with Europe, many of the war production facilities in Japan were dispersed among the civilian population.

Of course, the B-29 crews were not consulted about this change in approach. On a philosophical level, most would have undoubtedly preferred precision bombing to area bombing. However, on a gut level, their concerns were more pragmatic: to survive the missions and to end the war. And, if a particular type of mission would end the war faster, then so much the better.

Precision Bombing Missions

A precision bombing mission involved an attack against a specific target. This was a precision bombing mission against the Kawasaki Aircraft Plant at Akashi. Notice how the area surrounding the factories is relatively untouched.

The first, and probably most, B-29 missions were precision bombing missions.  One popular version of events is that, because of problems coping with the jet stream over Japan, the high-altitude daylight precision bombing missions were forever abandoned in favor of low-altitude night area bombing missions.  This change is said to have been initiated by the new commander Curtis LeMay, who ordered the B-29s to be stripped of their armament.

However, if you look at the B-29s shown on this website, you will not find any aircraft without guns. To the contrary, even after the area bombing missions started, the B-29s continued to be used in precision bombing missions. The jet stream did pose a problem on some missions.  However, the jet stream does not stay in one place. It was probably over Tokyo for only a few memorable days, and then moved elsewhere.

Over time, the bombing altitude was reduced. The bombing results from high altitude were not as good as had been expected. And the air defenses were not as bad.

B-29s dropping 4,000 lb bombs, instead of the regular 500 lb bombs, possibly on Akashi.
Photo courtesy of Sean Kelleher, all rights reserved.

Area Bombing Missions

Above: The aftermath of an are bombing attack on a section of Tokyo.

Left: An area bombing attack in progress.

The second most significant B-29 missions were area bombing missions. The most famous of these were the night bombing missions over Tokyo in March of 1945. The purpose of these missions was to destroy industrial capacity and to "de-house" the population. In contrast with Germany, much manufacturing was conducted in small workshops and homes scattered throughout the cities.

There are several misconceptions about these bombing missions. One is that General LeMay came up with the idea only after precision bombing missions had failed. In fact, the Army had been working on these missions for years and had even constructed a small Japanese town in the desert for testing purposes. The incendiary bombs that LeMay used were especially designed for use in Japan.

Another misconception is that the daylight precision missions had failed and were forever abandoned. While the early missions had some unexpected encounters with the jet stream over Japan, this was only a temporary set-back. The jet stream is always moving and rises in the summer. The 6th Bomb Group continued daylight precision missions, even after the area bombing missions.  And they did not permanently remove the guns from their planes.

Nevertheless, the area bombing missions were both productive and very risky. They were conducted at low altitude, at night. You still had hundreds of planes from different wings flying over the same small place in the dark. The first planes had to contend with finding the target. The other planes had to contend with violent updrafts and alert anti-aircraft gunners and searchlights. Although these were "area" bombing missions, the crews were under specific instructions not to bomb certain areas, such as the Emperor's palace. It is a tribute to their skill and bravery that they managed to avoid those areas.

The 6th Bomb Group received a Distinguished Unit Citation for their involvement in these missions.

Aerial Mining Operations

To General LeMay, the aerial mining operations were a diversion. They were performed at the request of the Navy. LeMay gave the 313th Bomb Wing the primary responsibility for these missions. They proved to be among the most effective missions during the war - and among the most dangerous. The 6th Bomb Group participated in 12 aerial mining missions and received a Distinguished Unit Citation for the July missions.

Dropping Aerial Mines [USAAF Photo, 1945]

Radar View of Shimosenki Straits
(Pirate's Log, p. 48)

Radar played an important part in these missions. The aircraft were required to drop each mines in a specific location, at night. By the time of the July missions, most of the radarmen had also been trained as navigators and bombardiers. They used these skills to help position the aircraft by reference to the landmasses that showed on the radar. The radarmen also tried to keep the aircraft away from heavily-defended areas.

The 6th Bomb Group lost three planes in these missions (almost 50% of the total combat losses), including one plane on the first mission and two planes on a couple of the July missions.  The later missions were long-distance operations. In what was probably the longest non-stop mission of the war, one B-29 flew 4,100 miles (19 hours and 40 minutes) non-stop. Much of the time involved dropping the mines, one by one, at precise locations.

Despite the risks, these operations resulted in the closing of most of the sea lanes around Japan. According to Japanese records, the aerial mining campaign accounted for 63% of all merchant shipping losses during the final 6 months of the war.

The aerial mining operations were part of "Operation Starvation".  This was a five phase operation that began on March 27 and ended in July. The 6th Bomb group participated in Phase 1, Phase 2 and Phase 5. Phase 1 (Mar 27 - Apr 30) targeted the Shimonoseki Straits, a critical and heavily-defended, part of the shipping lanes. Phase 2 (May 3 and 5) targeted the shipping lanes to the industrial centers.  Phase 4 (May 13) extended the minefields from Shimoneseki to northwest Honshu and Kyushu.  Phase 5 (Jul 9 - Aug 14) extended the blockade to include several Korean ports.

The B-29s proved to be the perfect plane for the mission, able to haul heavy loads for long distances. In order to drop the ordinance correctly, the B-29s had to flew these missions at low-altitude - from 5,000 to 8,000 feet. To minimize casualties, the B29s flew at night and established the route using radar and other means. Each aircraft carried a mix of 1,000 lb and 2,000 lb acoustic, magnetic and pressure mines. The B29s dropped each mine separately and each had a parachute.

[Phase 5]

Then on 9 July the Group returned to mining Jap waters. This time the objective was an interruption of shipping between the Asiatic mainland and Japanese home ports. To accomplish this, ports much be mined on the coast of Korea and on northern Honshu. These missions brought the Group its second Distinguished Unit Citation.

* * *

Other missions flown in this period were to the Korean ports of Rashin, Seishin, Gensan and Fusan and to the Jap ports of Fushiki, Nanao and Niigata. The last mining mission was flown on the night of 21-22 July.

The Rashin mining missions were the longest missions flown by any aircraft in the war. The mine fields were 2050 nautical miles from the home base in Tinian. On the first mission to Rashin on 11 July one B-29 flew the entire 4100 miles non-stop and landed at North Field 19 hours and 40 minutes after takeoff. This was undoubtedly the longest non-stop mission of the war. Other aircraft flew the mission with a stop at Iwo Jima for refueling either on the trip to Korea or on the return flight. Initial points on these missions were sixty miles south of Vladivostok, Siberia, and involved six hours of flight over the Empire.

* * *

These mining missions earned the Sixth's second Distinguished Unit Citation which was awarded for outstanding performance in armed conflict with the enemy. The missions to blockade enemy shipping involved extremely long hours of low-altitude flights over such heavily defended centers as Yawata. These deeds brought great credit to the organization and great praise from higher commands.

[Pirate's Log, pp. 49-51]

Here is a partial list of the names and locations of the minefields:


Kobe-Osaka area, Japan


Bingo Sea just North of Shikoku Island [PL41]




Bingo Sea just North of Shikoku Island [PL41]




Tokuyama area


Southeast of Shimonoseki Straits, Japan [PL41]


Northwest of Shimonoseki Straits, Japan






Nogoya area, Japan










Tsuruga Bay

[Source: History of the 505th Bombardment Group]

A partial map of Minefield Mike.  Many of the mines were dropped extremely close to fortified areas.
Figure from XXI Bomber Command Tactical Mission Report, Field Order No. 16, Mission No. 47, 313th Bombardment Wing, May 19, 1945.

Captain Gerald Mason, USN, has written an excellent summary of these aerial mining operations.

Tactical Support

B-29s occasionally flew tactical support missions to support Army or Navy operations. General LeMay thought these missions were contrary to the prime mission of the B-29 - which was strategic bombing. Nevertheless, the Navy felt that the missions were necessary to stop the Kamikaze attacks that were crippling the fleet.

The 6th Bomb Group flew several tactical missions in April, mostly against airfields on Kyushu.

The next day, April 8, ten other planes of the Group attacked Kanoya East Airfield on the southern tip of Kyushu.  This was the first of a series of missions for the purpose of neutralizing airfields from which the enemy was staging aerial attacks against naval units supporting ground forces on Okinawa.  These airfields were the homes of the Kimikaze flyers.

During April, eight such tactical missions were flown with an average attacking force of twelve B-29's.  Kanoya East Airfield was hit four times - on the 8, 17, 21 and 22 of April.  Miyakonojo Airfield was attacked twice - on the 27th and 28th.  Matsuyama Airfield was bombed once - on the 26th.  Bombing results were excellent with bomb patterns placed on building areas and runways.  Effectiveness was further demonstrated by the diminished intensity of enemy air attacks on Okinawa.

[Pirate's Log, p. 43]

Fighter Escort

In some cases, the B-29 would act as "mother hen" to fighters attempting to navigate the long over water flight to the target area. This was particularly helpful to land-based pilots who were not used to navigating long distances over water. This did not always work out well. In one case (not involving the 6th), several fighters were lost when the "flock" scattered after penetrating a thunderstorm. Four aircraft of the 6th Bomb Group flew a Fighter Escort mission to Iwo Jima on February 2.

Super-Dumbo (Air/Sea Rescue)

In this kind of mission, the aircraft took position at a certain location on the mission route and, if an aircraft went down, attempted to locate the crewmen and to drop life rafts. A Navy ship (including a submarine) or a Navy plane (such as a PBY) would perform the rescue. Three aircraft of the 6th Bomb Group flew a Super-Dumbo mission on April 1.

POW Supply

"Reamatroid" on a POW supply mission.
Photo provided by Les Morgan, Jr., all rights reserved.

Although they were not combat missions, the men of the 6th probably found these missions to be the most rewarding. These missions also resulted in a few air crew and aircraft casualties.

Dropping supplies at a POW camp.
Photo provided by Les Morgan, Jr., all rights reserved.

Loading POW supplies (including whiskey) on Guam.
Photo provided by Les Morgan, Jr., all rights reserved.

Weather Reconnaissance

Initially, the weather reconnaissance missions were performed by B-25s, TB-17s and B-24s.  The first B-29 flew on a weather reconnaissance mission over Tokyo on 8 Dec 1944.  Thereafter, the 73rd Squadron on Saipan conducted several weather reconnaissance flights.  For more on this subject see "The B-29 in Weather Reconnaissance" by Tom Robison.

Photo Reconnaissance

The 3rd and 41st Photo Recon Squadrons flew specially modified B-29s (F-13As) on photo reconnaissance missions.  These squadrons were based at various times on Saipan and Guam.

Leaflet Drops

Some B-29s groups dropped leaflets to Japanese civilians warning of pending attacks on Japanese cities.  This is one of the most famous examples and lists the names of Japanese cities that might be bombed.

On the night of 27-28 July 1945, the 73rd Bomb Wing dropped 700,000 of these leaflets on several Japanese cities.  The message read:


Read this carefully as it may save your life or the life of a relative or a friend. In the next few days, four or more of the cities named on the reverse side of this leaflet will be destroyed by American bombs. These cities contain military installations and workshops or factories, which produce military goods. We are determined to destroy all of the tools of the military clique that they are using to prolong this useless war. Unfortunately, bombs have no eyes . So, in accordance with America's well-known humanitarian policies, the American Air Force, which does not wish to injure innocent people, now gives you warning to evacuate the cities named and save your lives.

America is not fighting the Japanese people but is fighting the military clique, which has enslaved the Japanese people. The peace, which America will bring, will free the people from the oppression of the Japanese military clique, mean the emergence of a new, and better Japan.

You can restore peace by demanding new and better leaders who will end the War.

We cannot promise that only these cities will be among those attacked, but at least four will be, so heed this warning and evacuate these cities immediately.

Post-war intelligence indicates that the leaflets were very effective and that civilians rushed out of the cities, leaving no time for the military to prepare special defenses.