Attack on Pearl Harbor

Pearl Harbor is a main US Naval Base for the pacific fleet located on the territory of Hawaii in the United States.

On December 7th, 1941, under the orders of Grey Hunter, a carrier strike force of the Imperial Japanese Navy launched a surprise attack on the US Fleet docked at the harbor. The attack was continued on December 8th, before being called off late in the day due to excessive Japanese aircraft losses.

Aircraft Carriers

 * IJN Kaga
 * IJN Hiryu
 * IJN Soryu
 * IJN Shokaku
 * IJN Zuikaku
 * IJN Akagi

Battleships

 * IJN Hiei
 * IJN Kirishima

Heavy Cruisers

 * IJN Tone
 * IJN Chikuma

Light Cruisers

 * IJN Abukuma

Destroyers
9 in total

Submarines
3 in total

Battleships

 * USS Tennessee
 * USS Pennsylvania
 * USS Nevada
 * USS California
 * USS Maryland
 * USS Arizona

Heavy Cruisers

 * USS New Orleans

Light Cruisers

 * USS Honolulu

Destroyers

 * 3 damaged/sunk

Submarines

 * 1 damaged/sunk

Aftermath
The United States declares war on the Empire of Japan... retroactively effective December 6th.

The battleships USS Maryland, USS Tennessee and later the USS Oklahoma are presumed to be sunk.

Reaction
Analysts at the time predicted that the decision to abandon the attack before the third day might be the root cause of Japanese defeat in the war.