Battle for Iwo Jima - World War II

Authors Avatar

Battle for Iwo Jima - World War II
February 19 to March 16,1945
Historical Facts and Figures

  • Location: Approximately 650 miles south of Tokyo, Japan.
  • Size of Island: Approximately 2 miles wide, 4 miles long; 8 square miles
  • Iwo Jima was the first native Japanese soil invaded by Americans in W.W.II. Approximately 60,000 Americans and 20,000 Japanese participated in the Battle.
  • The American Flag Raising on Mt. Suribachi took place on February 23, 1945 - the fifth day of battle. The Battle continued with increased intensity for a month more. Almost 7,000 Americans were killed in action at Iwo Jima - more than 20,000 American casualties.
  • Approximately one-third of all Marines killed in action in World War II were killed at Iwo Jima, making Iwo Jima the battle with the highest number of casualties in Marine Corps history.
  • Twenty-seven Congressional Medals of Honor were awarded in the Battle - more than were awarded to Marines and Navy in any other Battle in our country's history.
  • Three of the men who raised the flag in the Joe Rosenthal photo were killed before the Battle was over.
  • After the capture of Iwo Jima, more than 30,000 American Airmen's lives were saved when more than 2,400 disabled B-29 bombers were able to make emergency landings at the Iwo Jima Airfield after making bombing flights over Japan.
  • Approximately 132 Americans killed at Iwo Jima were unidentifiable and listed as unknown.
  • More than 50 4th Division Marines died of wounds aboard ship and were buried at sea.
  • The U.S. government returned the island of Iwo Jima to the Japanese government in 1968, after the bodies of the men in the 3rd, 4th, and 5th Division cemeteries were removed to the United States.

The Battle of Iwo Jima

1945 Pacific theater

The information provided comes from Iwo Jima, by Richard Newcomb 1982. Naval action information is from The Fast Carriers:The Forging of an Air Navy, Clark Reynolds.

Operation Detachment

  • Reasons for the invasion of Iwo Jima 
  • strategically the island of Iwo Jima was crucial to continue B-29 raid on mainland Japan.
  • The island contained 3 airstrips that the Japanese had been using for their Kamikaze attacks.
  • With this island captured the Kamikazes would have to operate from Okinawa or Kyushu.
  • The airfields would provide a base for escort planes on their raids with the B29s.
  • Iwo Jima would provide an emergency landing strip half way from Marianas island to mainland Japan

2/19 U.S Marines land on Iwo Jima at 8:59A.M.. This comes after 10 weeks of bombing from carrier based planes and medium bombers. The preliminary bombardment had been the heaviest up to that point in the war. A total of 70,000 U.S. Marines available for the invasion. Against 27,000 Japanese

The operation is under the overall command of Adm. R. A. Spruance, Commander Fifth Fleet. Vice Adm. R. K. Turner is the Joint Expeditionary Force Commander and Lt. Gen. H. M. Smith, UsmC, commands the Expeditionary Troops.

What the Marines had to go through on D-Day

The status of the invasion beaches on Iwo Jima after D-Day

Marine Artillery Firing Support to the Ground Troops

  • The Japanese tactics would be more of a defense in-depth. No suicide counter attacks.
  • The Japanese would have built 800 pillboxes and over 3 miles of tunnels on an island that was only 8 square miles in size.
  • Marines landings all but easy.
  • The volcanic ash impossible to climb through with 100 pound packs carried by the Marines.
  • The high angle of the slope made return fire very difficult during the initial landings.
  • The Japanese started a mortar barrage that began at 9:15A.M.
  • Beaches and slopes leading from the beaches all zeroed in by the Japanese gunners.
  • Anti-tank mines on the slopes effective against the LVT(landing Vechicle Tracked) that are being used to deliver the Marines ashore.
  • The first objective was Mt. Suribachi located on the southern end of the island.
  • Until Mt. Suribachi was taken the Japanese could fire on any position the Marines had established.
  • It would be the Seabees and other support units that would have high casualties in the early stages of the invasion.
  • By the end of the first day the Marines had not captured half of their original objective but they had over 30,000 troops ashore to begin moving in land with force.
  • Mt. Suribachi had been isolated and cut off and part of Airfield #1 had been captured.

2/20 Marines start their advance south to Mt. Suribachi and north to the airfields.

  • The fighting up the mountain some of the most intense during the war.
  • Japanese soldiers entrenched in the mountain and would have to be taken out by flame throwers and satchel charges.
  • Close air support by Naval and Marine pilots sometimes only a few hundred yards from advancing Marines.
  • Use of Cruisers and Destroyers for close bombardment on Japanese defenses.
  • No Banzai attacks by the Japanese. This would insure it to be a long drawn out battle.
  • Marines even have to resort to setting fire to the ravines with gasoline to force out Japanese.
Join now!

2/21 Marines continuing their advance North and South on the island.

  • Intense Kamikaze attacks strike U.S. naval invasion ships.
  • The carrier Bismark Sea is sunk and carrier Saratoga is also damaged.
  • fighting on the island now a bitter frontal attack reminiscent of the trench warfare of WW I.
  • Daily gains are measured in yards with long bitter fighting for each objective.

2/22 Marines finally have Mt. Suribachi surrounded and begin to move up the face of the mountain.

2/23 First units of Marines now at the top of Mt. Suribachi after bitter ...

This is a preview of the whole essay