Battles in the Pacific Ocean World War II

Dave's Warbirds: Very extensive information about the aircrafts and air forces of the US, and information about the US carrier-based air warfare in the Pacific
Military History Online - WWII: Several articles about the battles and campaigns of World War II. Also includes articles on other wars
Military maps of WWII: Very good resource for maps of World War II
OnWar.com - Military History Research: Tanks of all major nations of World War II, maps of the battlefronts and a timeline of World War II, as well as several articles. Also includes information on modern-day AFVs and military history in general.
Pearl Harbor Remembered: A lot of interesting information about the Japanese attack on Pearl Harbor, including maps and information about the battle
Pearl Harbor: Remembered: Exellent information about the Japanese attack on Pearl Harbor
World War II Armed Forces - Orders of Battle and Organizations: Dr. Leo Niehorster's excellent website, with orders of battles for pretty much every country which fought in the war. His website also include errata pages for his books, and other interesting pieces of information
worldwar-2.net: Elaborate timeline of World War II, as well as many other interresting articles
WW2technik.de - Tom's webseite: Very detailed information about Japan's weapons and battles of World War II