The man in command of all US naval forces in the Pacific was Admiral Chester Nimitz.
Normally an Admiral would command fleets of ships, an example of one was Horatio Nelson
During World War II, the U.S. Navy operated five primary fleets: the Atlantic Fleet, the Pacific Fleet, the Asiatic Fleet, the Mediterranean Fleet, and the Seventh Fleet. The Atlantic and Pacific Fleets were the largest and most significant, with the Pacific Fleet being crucial in the war against Japan. These fleets played vital roles in various major battles and operations throughout the conflict.
Overall Allied command in the Pacific Theater of Operations (PTO) was two-fold: General Douglas MacArthur commanded the South West Pacific region, which encompassed Australia, New Guinea, and the Philippines, among other islands. Admiral Chester Nimitz commanded the Pacific Ocean region, which encompassed all Pacific areas north of MacArthur's command-area.
"Island Hopping" .
The Battle of Midway .
Normally an Admiral would command fleets of ships, an example of one was Horatio Nelson
Third and Seventh Fleet
During World War II, the U.S. Navy operated five primary fleets: the Atlantic Fleet, the Pacific Fleet, the Asiatic Fleet, the Mediterranean Fleet, and the Seventh Fleet. The Atlantic and Pacific Fleets were the largest and most significant, with the Pacific Fleet being crucial in the war against Japan. These fleets played vital roles in various major battles and operations throughout the conflict.
United States Pacific Command was created in 1947.
Two military strategies the Allies used in the Pacific were island-hopping and
Allied Command Pacific
U.S. troops were needed to guard Pacific and Artic ports for the Allies.
Overall Allied command in the Pacific Theater of Operations (PTO) was two-fold: General Douglas MacArthur commanded the South West Pacific region, which encompassed Australia, New Guinea, and the Philippines, among other islands. Admiral Chester Nimitz commanded the Pacific Ocean region, which encompassed all Pacific areas north of MacArthur's command-area.
"Island Hopping" .
Japan and Russia
The fleets moved on radio silence.
If you are asking about the famous D-Day which is also known as the 'Normandy Landings' by the Allies at Normandy, France on June 6, 1944... then you may be confused. The US & British naval units involved in that most famous invasion are from the Atlantic Fleets, not the Pacific Fleets. Historically all Allied invasions or major operations in all Theaters (North Africa, Mediterranean, Europe, Pacific, etc.) all used the term "D-Day" in planning & executing the operation to refer to the date that the invasion starts. They also used "H-Hour", etc. If you are referring to something that happened in the Pacific Ocean during the war then you need to be more specific.