Probably Okinawa-second battle, which involved the loss of the 80,000 ton Battleship Yamato!( a ficitonalized accoutn wasz the film In Harm"s Way). It should be understood the entire Japanese task force was essentialloy on a suicide mission.
ADDITIONAL ANSWER: The title for "largest naval battle in history" is a bit disputted. The most serious claimant would be The Battle of Leyte Gulf (see link) in the Philippines Sea.
Further Info:
www.warships1.com has the orders of battle of all the engagements which constitute the Battle of Leyte Gulf. Finding the locations of these engagements on a map is a great way to apreciate the vast area this battle was fought over.
see:
Palawan Passage, 23 October 1944 (www.warships1.com/index_oob/OOB_WWII_Pacific/OOB_WWII_Palawan.htm)
Battle of Sibuyan Sea, 24 October 1944 (www.warships1.com/index_oob/OOB_WWII_Pacific/OOB_WWII_Sibuyan_Sea.htm)
Battle of Surigao Strait, 24-25 October 1944 (www.warships1.com/index_oob/OOB_WWII_Pacific/OOB_WWII_Surigao-Strait.htm)
Battle off Samar, 25 October 1944 (www.warships1.com/index_oob/OOB_WWII_Pacific/OOB_WWII_Samar.htm)
Battle of Cape Engano, 25 October 1944 (www.warships1.com/index_oob/OOB_WWII_Pacific/OOB_WWII_Cape_Engano.htm)
The Battle of the Bulge, fought against the Germans, in Belgium, during the winter of 1944-45.
Battle of Towton was the largest and most bloodiest battle fought.
The Battle of Arnhem is one of the greatest battles in history. It was fought in and around Dutch towns.
Gettysburg 1-3 July 1863
The Battle of Gettysburg was not only the largest battle fought in the Civil War; it was the largest battle ever fought in North America. The Gettysburg Battle involved approximately 85,000 men in the Union's Army of the Potomac, led by General George Gordon Meade, and around 75,000 men in the Confederate Army of Northern Virginia, led by General Robert Edward Lee. 23,049 Union soldiers and 28,063 Confederate soldiers were killed, wounded or went missing.
Bentonville
The largest battle was located at Mine Creek. It was called the Battle of Mine Creek.
The Battle of the Bulge, fought against the Germans, in Belgium, during the winter of 1944-45.
The Battle of Bentonville was the largest and most important battle of the Civil War fought in North Carolina. There was one battle during the Revolutionary War fought in North Carolina-- The Battle of Guilford Courthouse.
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The battle of Towton fought on March 29, 1461
brooklyn
Battle of Towton was the largest and most bloodiest battle fought.
The Battle of the Bulge
Saratoga
The largest naval battle in history was the Battle of Leyte Gulf fought in October 1944 during WW2. The Battle of the Sibuyan Sea was part of that battle. The Battle of Leyte Gulf was in preparation for the invasions of allied troops into the Philippines; the 2nd Battle of the Philippines.
History's first decisive aircraft carrier battle. OR History's first decisive sea battle fought between carrier fleets.