Pearl Harbor: A 75th anniversary timeline of the 'date which will live in infamy'

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Before Pearl Harbor, the United States remained the odd country out as the only nation still neutral in the global World War II conflict.

With a worsening situation in Europe, it seemed inevitable that the Axis powers would clash with the U.S. Tensions only escalated in July of 1940 when President Franklin D. Roosevelt endorsed an embargo preventing oil from being shipped to Japan. Throughout the summer of 1941, Japanese Admiral Yamamoto trains forces and finalizes planning of the attack on Pearl Harbor.

Located on the Hawaiian island of Oahu, Pearl Harbor was a symbol of military force that housed over 300 ships. At the time, it was considered a crucial naval base, due to its location in the Pacific Ocean.

Below is a timeline of events leading up to and throughout Dec. 7, 1941 -- what President Roosevelt referred to as "a date which will live in infamy."

See vintage photos from the attack:

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The attack on Pearl Harbor 75 years later
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The attack on Pearl Harbor 75 years later
A Marine rifle squad fires a volley over the bodies of fifteen officers and men killed at Naval Air Station Kanoehe Bay during the raid the previous day at Pearl Harbor, Hawaii, U.S. December 8, 1941. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. U.S. Navy/National Archives/Handout via ReutersATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
A model made for a Japanese propaganda film on the Pearl Harbor raid, showing ships located as they were during the December 7, 1941 attack, is seen in a photograph which was brought back to the U.S. from Japan at the end of World War II by Rear Admiral John Shafroth. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016 U.S. Naval History and Heritage Command/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
Ship's Chief Petty Officers listen to the radio broadcast of President Franklin D. Roosevelt's address to the Congress requesting a declaration of War against the Axis powers, December 8, 1941. Note the photograph of President Roosevelt on the bulkhead. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. U.S. Navy/National Archives/Handout via ReutersATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
A wrecked U.S. Army Air Corps B-17C bomber lies at Hickam Air Field, following the end of the Japanese raid on Pearl Harbor, Hawaii, U.S. December 7, 1941. This plane, piloted by Captain Raymond T. Swenson, was one of those that arrived during the raid after flying in from California. It was hit by a strafing attack after landing and burned in half. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. U.S. Navy/National Archives/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
The body of a sailor killed during the Japanese air attack at Naval Air Station Kanoehe Bay lies on the shoreline, at Pearl Harbor, Hawaii, U.S. December 7, 1941. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. U.S. Navy/National Archives/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
Sailors attempt to save a burning PBY amphibious aircraft at during the Japanese raid on Naval Air Station Kaneohe Bay, Hawaii December 7, 1941. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016 U.S. Navy/U.S. Naval History and Heritage Command/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
The destroyers USS Downes and USS Cassin lie wrecked in Drydock One ahead of the battleship USS Pennsylvania soon after the end of the Japanese air attack on Pearl Harbor, Hawaii, U.S. December 7, 1941. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. Navy Photographer's Mate Harold Fawcett/U.S. Navy/National Archives/Handout via ReutersATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
The forward superstructure of the sunken battleship USS Arizona burns after the Japanese raid on Pearl Harbor, December 7, 1941. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016 U.S. Navy/U.S. Naval History and Heritage Command/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
The destroyers USS Downes and USS Cassin lie wrecked in Drydock One ahead of the battleship USS Pennsylvania soon after the end of the Japanese air attack on Pearl Harbor, Hawaii, U.S. December 7, 1941. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. U.S. Navy/National Archives/Handout via ReutersATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
Sailors in a motor launch rescue a survivor from the water alongside the sunken battleship USS West Virginia during or shortly after the Japanese air raid on Pearl Harbor, Hawaii, U.S. December 7, 1941. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. U.S. Navy/National Archives/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
Gunners on board the minesweeper USS Avocet look for more Japanese planes, at about the time the air raid ended on Pearl Harbor, Hawaii, U.S. December 7, 1941. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. U.S. Navy/National Archives/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
A Japanese Type 00 (Zero) fighter with markings from the carrier Akagi is seen after it crashed during the attack at Fort Kamehameha, near Pearl Harbor, Hawaii, U.S. December 7, 1941. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. U.S. Navy/National Archives/Handout via ReutersATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
U.S. Marines await the possible return of Japanese aircraft on the parade ground at the Pearl Harbor Marine Barracks, Hawaii, U.S. December 7, 1941. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. U.S. Naval History and Heritage Command/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
The crew of the Japanese carrier Shokaku cry Banzai as a Type 97 Kate carrier attack plane takes off as the second wave attack is launched on Pearl Harbor, Hawaii, U.S. December 7, 1941. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. U.S. Navy/National Archives/Handout via ReutersATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
A Japanese Type 00 (Zero) carrier fighter trails smoke after it was hit by anti-aircraft fire during the attack on Pearl Harbor, Hawaii, U.S. December 7, 1941. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. U.S. Navy/National Archives/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
Flak bursts of anti-aircraft shells pepper the skyline above rising smoke from the battleship USS Arizona during the Japanese raid on Pearl Harbor, Hawaii, U.S. December 7, 1941. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. U.S. Navy/National Archives/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
The damaged battleship USS California, listing to port after being hit by Japanese aerial torpedoes and bombs, is seen off Ford Island during the attack on Pearl Harbor, Hawaii, U.S. December 7, 1941. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. U.S. Navy/National Archives/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
A Japanese Navy Type 99 Val carrier bomber is seen in action during the attack on Pearl Harbor, Hawaii, U.S. December 7, 1941. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. U.S. Navy/National Archives/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
The battleship USS Arizona burns on Battleship Row, beside Ford Island in an aerial photo taken from a Japanese aircraft during the attack on Pearl Harbor, Hawaii, U.S. December 7, 1941. Ships seen are (L-R) USS Nevada, USS Arizona with USS Vestal moored outboard, USS Tennessee with USS West Virginia moored outboard and USS Maryland with USS Oklahoma capsized alongside. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016 U.S. Naval History and Heritage Command/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
Sailors stand amid wrecked planes at the Ford Island seaplane base, watching as the destroyer USS Shaw explodes in the center background during the Japanese attack on Pearl Harbor, Hawaii, U.S. December 7, 1941. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. U.S. Navy/National Archives/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
The forward magazines of the destroyer USS Shaw explode after a bombing attack by Japanese planes on Pearl Harbor, Hawaii, U.S. December 7, 1941. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016 U.S. Navy/U.S. Naval History and Heritage Command/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
The forward magazine of the destroyer USS Shaw explodes during the second Japanese attack wave on Pearl Harbor, Hawaii, U.S. December 7, 1941. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016 U.S. Naval History and Heritage Command/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
A Japanese bomber aircraft is seen in the foreground of an aerial photograph taken by a Japanese pilot during the attack on Pearl Harbor, Hawaii, U.S. December 7, 1941. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. US Navy/NEA Services/Handout via ReutersATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
An officer on the Japanese aircraft carrier Shokaku watches as planes take off to attack Pearl Harbor, Hawaii, U.S. December 7, 1941. The Kanji inscription at left is a commander order to pilots to do their duty to destroy (the enemy). The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. U.S. Navy/National Archives/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
A Japanese Navy Type 97 Kate carrier attack plane takes off from the aircraft carrier Shokaku, en route to attack Pearl Harbor, Hawaii, U.S. December 7, 1941. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. U.S. Navy/National Archives/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
A chart identifying ship mooring locations and entitled (at upper left) "Report on positions of enemy fleet at anchorage", is seen after it was recovered from a Japanese aircraft that was downed during the attack on Pearl Harbor, Hawaii, U.S. December 7, 1941. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. US Navy/National Archives/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
Japanese Navy Type 99 Val carrier bombers prepare to take off from an aircraft carrier to attack Pearl Harbor, Hawaii, U.S. December 7, 1941. The ship in the background is the carrier Soryu. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. U.S. Navy/National Archives/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
An aerial photograph taken the year before the Japanese raid shows the East Loch and the the Fleet Air Base on Ford Island in Pearl Harbor, Hawaii, U.S. May 3, 1940. Visible are the carrier Yorktown, ten battleships, seventeen cruisers, two light cruisers, and over thirty destroyers. The 75th anniversary of the attack, which brought the United States into World War Two, is marked on December 7, 2016. U.S. Navy/National Archives/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.
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Nov. 16: Submarines -- which were the first units involved in the attack -- leave Japan and head for Pearl Harbor

Nov. 26: Remaining attack forces consisting of the main body, aircraft carriers and escorts leave Japan for Hawaii

Nov. 27: Commander Husband E. Kimmel and General Walter Short receive a "war warning" from Washington relative to a Japanese attack. Pearl Harbor is listed as a possible target.

Dec. 7:

3:42 a.m.: The minesweeper Condor sends a blinker-light message to the destroyer Ward after it detects a submarine heading west.

6:45 a.m.: The Ward discovers the detected submarine and strikes it at the waterline.

7:02 a.m.: A radar station picks up the signal of approaching planes. Commander Kimmel decides to "wait for verification of the report."

7:20 a.m.: An Army lieutenant in training at Fort Shafter radar station tells them not to worry about the signals, assuming they are an incoming group of expected B-15 planes.

7:33 a.m.: U.S. code breakers crack Japan's diplomatic code. Having broken off international negotiation, General Short receives warning of the increased threat of attack. Because of a black out in communication, Gen. Short will not receive this message until about 3 p.m.

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Artifacts from Pearl Harbor
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7:40 a.m.: 49 high-altitude bombers, 51 dive-bombers, 40 torpedo planes and 43 fighters take off from Japanese carriers.

7:49 a.m.: Air-attack commander Mitsuo Fuchida orders his telegraph operator to tap out "to, to, to" which means attack. Then other taps: "to ra, to ra, to ra," meaning attack, surprise achieved.

7:55 a.m.: At the Command Center on Ford Island, Comdr. Logan C. Ramsey sees "something black" fall out of a low-flying plane, realizing it's a bomb. He then orders a telegraph operators to send out the uncoded message "AIR RAID ON PEARL HARBOR X THIS IS NOT DRILL" to every ship and base.

The coordinated attack commences. Dive-bombers strike Army Air Forces' Wheeler Field, north of Pearl Harbor, and Hickam Field, near Ford Island's Battleship Row. Most U.S. planes parked on the ground are destroyed.

8:10 a.m.: A high-altitude bomber hits the USS Arizona. This sets off more than a million pounds of gunpowder. 1,177 men are killed.

8:17 a.m.: Through the chaos of fire and smoke in the harbor, the Helm destroyer heads for open sea. A lookout on board spots a two-person submarine caught in a reef. Trying to escape the sinking vessel, one crewman drowns and the other becomes the U.S.'s first World War II prisoner of war.

8:39 a.m.: The destroyer Monaghan hits a submarine at top speed, dropping depth charges. The sinking submarine fires a torpedo, but does not hit anything.

8:50 a.m.: After being bombed, The Nevada grounds herself off Hospital Point.

8:54 a.m.: A second wave -- composed of 35 fighters, 78 dive-bombers and 54 high-altitude bombers attacks. Bombers hit the light cruiser Raleigh, battleship Pennsylvania and oil tanks between the destroyers Cassin and Downes.

9:30 a.m.: A bomb hits and blows the bow off the destroyer Shaw. A photo of the explosion is one of the more notable images from the day's attack The Shaw will eventually be repaired and back in commission.

10:30 a.m.: Nurses treat severely burned and wounded men. Most are simply treated with morphine, and the death toll eventually reaches 2,390.

1:00 p.m.: The Pearl Harbor strike forces cease attack.

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