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Also see:
Battle of Iwo Jima
Battle of Iwo Jima -
Japanese Defense
Iwo Jima Battle Ships
Iwo Jima Battle Assault
Ship LHD-7
Iwo Jima Battle Assault
Ship LPH-2
Iwo Jima Battle Assault
Ship LPH-2 Operations
Battle of Iwo
Jima Preparations
Conflict:
WW2 World War II, Pacific War |
Date:
February 16, 1945 March 26, 1945 |
Place:
Iwo Jima, Japan |
Outcome:
American victory |
Combatants |
United
States |
Japan |
Commanders |
Holland
Smith |
Tadamichi
Kuribayashi |
Strength |
70,000 |
22,000 |
Casualties |
7,000
dead,
19,000 wounded |
21,800
dead,
200 POW |
Battle of Iwo Jima
- American Landing
Pre-invasion bombardment of Iwo Jima, On 7 October 1944
Admiral Chester Nimitz and his staff issued a staff study
for preliminary planning, which clearly listed the
objectives of Operation Detachment. The overriding
purpose of the operation was to maintain unremitting
military pressure against Japan and to extend American
control over the Western Pacific. In American hands, Iwo
Jima could be turned into a base from which to attack the
Japanese home islands, protect bases in the Marianas,
cover naval forces, conduct search operations of the
approaches to the Japanese home islands, and provide
fighter escort for very long-range operations. Three
tasks specifically envisioned in the study were the
reduction of enemy naval and air strength and industrial
facilities in the home islands; the destruction of
Japanese naval and air strength in the Bonin Islands, and
the capture, occupation, and subsequent defense of Iwo
Jima, which was to be developed into an air base.
Battle of Iwo
Jima - General Holland Smith
On 9 October, General Holland Smith received the staff
study, accompanied by a directive from Admiral Nimitz
ordering the seizure of Iwo Jima. This directive
designated specific commanders for the operation. Admiral
Raymond A. Spruance, Commander, Fifth Fleet, was placed
in charge as Operation Commander, Task Force 50. Under
Spruance, Vice Admiral Richmond Kelly Turner, Commander,
Amphibious Forces, Pacific, was to command the Joint
Expeditionary Force, Task Force 51. Second in command of
the Joint Expeditionary Force was Rear Admiral Harry W.
Hill. General Holland Smith was designated Commanding
General, Expeditionary Troops, Task Force 56.
It was not accidental that these men were selected to
command an operation of such vital importance that it has
since become known as "the classical amphibious
assault of recorded history." All of them had shown
their mettle in previous engagements. One chronicler of
the Iwo Jima operation put it in the following words:
Battle of Iwo
Jima - Amphibious
Techniques
The team assigned to Iwo Jima was superb the very
men who had perfected the amphibious techniques from
Guadalcanal to Guam. Nearly every problem, it was
believed, had been met and mastered along the way, from
the jungles of Guadalcanal up through the Solomons, and
across the Central Pacific from the bloody reefs of
Tarawa to the mountains of the Marianas.
The major units assigned to the Landing Force were the
3rd, 4th, and 5th Marine Divisions. The 3rd Marine
Division had already distinguished itself on Bougainville
in the Solomons and on Guam in the Marianas. While
planning for Operation Detachment was in progress during
the late autumn of 1944, the division was still
reorganizing on Guam after the heavy fighting for that
island and was actively engaged in rounding up or
dispatching Japanese that continued to infest the island.
Battle of Iwo
Jima - Admiral
Spruance
When Admiral Spruance assumed command of all forces
assigned to the Central Pacific Task Force on 26 January
1945, CinCPOA Plan 11-44 was in full effect. Designated
for the beach assault were the 4th and 5th Marine
Divisions, less the 26th Marines, which was to be held in
Landing Force reserve. For training purposes prior to the
operation, the 26th Marines would remain with the 5th
Division. The 3d Marine Division was to stage on Guam and
would remain as reserve on board ship in the objective
area until D plus 3.
The V Amphibious Corps (VAC) scheme of maneuver for the
landings was relatively simple. The 4th and 5th Marine
Divisions were to land abreast on the eastern beaches,
the 4th on the right and the 5th on the left. When
released to VAC, the 3d Marine Division, as Expeditionary
Troops Reserve, was to land over the same beaches to take
part in the attack or play a defensive role, whichever
was called for. The plan called for a rapid exploitation
of the beachhead with an advance in a northeasterly
direction to capture the entire island. A regiment of the
5th Marine Division was designated to capture Mount
Suribachi in the south.
Since there was a possibility of unfavorable surf
conditions along the eastern beaches, VAC issued an
alternate plan on 8 January 1945, which provided for a
landing on the western beaches. However, since
predominant northerly or northwesterly winds caused
hazardous swells almost continuously along the southwest
side of the island, it appeared unlikely that this
alternate plan would be put into execution.
Battle of Iwo
Jima - Eastern
Beaches
The eastern beaches over which the landings were to be
made extended for about 3,500 yards northeastward from
Mount Suribachi to the East Boat Basin. For purposes of
organization and control of the invasion force, these
beaches were divided into seven 500-yard segments, which,
from left to right, were designated as Green, Red 1 and
2, Yellow 1 and 2, and Blue 1 and 2. The 5th Marine
Division, landing over Green, Red 1, and Red 2 beaches,
was to advance straight across the island, which at this
point formed a narrow isthmus, until it reached the west
coast. At the same time, it was to hold along the right,
while part of the division wheeled to the south to
capture Mount Suribachi. The 4th Marine Division had the
specific mission of moving into the center of the
isthmus, while its right flank swerved to the north to
seize Motoyama Plateau, the high ground above the East
Boat Basin. Unless this vital ground to the north of the
invasion beaches and Mount Suribachi to the
southterrain features which overlooked the beaches
and permitted the enemy to fire at the exposed Marines at
willwere quickly seized, the landing force could be
expected to take very heavy casualties.
Once the southern portion of Iwo Jima had been secured,
the two divisions could join in a combined drive to the
north. At this time, the 3d Marine Division, initially in
Expeditionary Troop Reserve on board ships near the
beachhead, could be disembarked and landed to assist in
maintaining the momentum of the VAC attack.
The detailed scheme of maneuver for the Iwo Jima landings
provided for the 28th Marines of the 5th Marine Division,
commanded by Colonel Harry B. Liversedge, to land on the
extreme left of the corps on Green 1. On the right of the
28th Marines, the 27th, under Colonel Thomas A. Wornham,
was to attack towards the west coast of the island, then
wheel northeastward and seize the O-1 Line. Action by the
27th and 28th Marines was designed to drive the enemy
from the commanding heights along the southern portion of
Iwo, simultaneously securing the flanks and rear of VAC.
As far as the 4th Marine Division was concerned, the 23d
Marines, commanded by Colonel Walter W. Wensinger, was to
go ashore on Yellow 1 and 2 beaches, seize Motoyama
Airfield No. 1, then turn to the northeast and seize that
part of Motoyama Airfield No. 2 and the O-1 Line within
its zone of action. After landing on Blue Beach 1, the
25th Marines, under Colonel John R. Lanigan, was to
assist in the capture of Airfield No. 1, the capture of
Blue Beach 2, and the O-1 Line within its zone of action.
The 24th Marines, under Colonel Walter I. Jordan, was to
be held in 4th Marine Division reserve during the initial
landings. The 26th Marines, led by Colonel Chester B.
Graham, was to be released from corps reserve on D-Day
and prepared to support the 5th Marine Division.
Division artillery was to go ashore on order from the
respective division commanders. The 4th Marine Division
was to be supported by the 14th Marines, commanded by
Colonel Louis G. DeHaven; Colonel James D. Wailer's 13th
Marines was to furnish similar support for the 5th Marine
Division.
The operation was to be so timed that at H-Hour 68 LVT
(A) 4s, comprising the first wave, were to hit the beach.
These vehicles were to advance inland until they reached
the first terrace beyond the high-water mark. The armored
amphibians would use their 75 mm howitzers and machine
guns to the utmost in an attempt to keep the enemy down,
thus giving some measure of protection to succeeding
waves of Marines who were most vulnerable to enemy fire
at the time they debarked from their LVTs. Though early
versions of the VAC operations plan had called for tanks
of the 4th and 5th Tank Battalions to be landed at H plus
30, subsequent studies of the beaches made it necessary
to adopt a more flexible schedule. The possibility of
congestion at the water's edge also contributed to this
change in plans. In the end, the time for bringing the
tanks ashore was left to the discretion of the regimental
commanders. Company A of the 5th Tank Battalion attached
to the 27th Marines was scheduled to land on the Red
Beaches at the prearranged time of H plus 30 minutes.
In the event that the landings took place on the western
beaches of Iwo, the alternate plan made provision for a
company of the 24th Marines, reinforced by a platoon of
armored amphibians from the 2d Armored Amphibian
Battalion, to seize Kangoku Rock, a 600 m island lying
about 700 m northwest of Iwo Jima. The island could be
used as an artillery site and for this reason a
contingency plan was prepared to land the 105 mm
howitzers of 4/14 there.
The Allies wanted Iwo Jima not only to neutralize threats
to its bombers and shipping, but to use its airfields for
fighter escort and emergency bomber landings. On February
16, 1945, they commenced a massive three-day air and
naval bombardment of the island.
Battle of Iwo Jima - D Day
At 02:00 on February 19, battleship guns
signaled the commencement of D-Day. Soon 100 bombers
attacked the island, followed by another volley from the
naval guns. At 08:30, the first of an eventual 30,000
marines of the 3rd, 4th, and 5th Marine Divisions, under
V Amphibious Corps, landed on the Japanese island of Iwo
Jima and a battle for the island commenced.
The Marines faced heavy fire from Mount Suribachi at the
south of the island, and fought over inhospitable
terrain: rough volcanic ash which allowed neither secure
footing or the digging of foxholes. Nevertheless, by that
evening the mountain had been surrounded and 30,000
Marines had landed. About 40,000 more would follow.
The climb up Suribachi was fought by the yard. Gunfire
was ineffective against the Japanese, but flame throwers
and grenades cleared the bunkers. Finally, on February
23, the summit was reached. Associated Press photographer
Joe Rosenthal took the famous photograph "Raising
the Flag on Iwo Jima" of the United States flag
being planted on the mountain's summit.
With the landing area secure, more Marines and heavy
equipment came ashore and the invasion proceeded north to
capture the airfields and the remainder of the island.
With their customary bravery, most Japanese soldiers
fought to the death. Of over 21,800 defenders, only 200
were taken prisoner.
"Unloading on the beach of Iwo Jima"The Allied
forces suffered 26,000 casualties, with nearly 7,000
dead. Over a quarter of the Medals of Honor awarded to
marines in World War II were given for conduct in the
invasion of Iwo Jima.
However, the usefulness of the island as an airbase was
justified even before the battle was concluded. This
happened when the B-29 bomber Dinah Might reported it was
low on fuel near the island and requested an emergency
landing. Despite enemy fire, the airplane landed on the
Allied controlled section of the island without incident
and was maintainanced, refueled and departed.
The island of Iwo Jima was declared secure on March 26,
1945.
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