The Lexington and Saratoga were supposed to have been Battle Cruisers but because of the Washington Naval Treaty they were changed over to carriers.
The Saratoga survived the war but the Lexington was sunk at the battle of Coral Sea. A Essex class CV was named Lexington and fought in WWII.
The Hornet and Yorktown carriers where one of the first US carriers but were also sunk early in WWII but the names were reused on newer Essex class ships.
All of the same names used on different ships during the same war makes things confusing.
If memory serves the US made 24 Essex CVs during the WWII and started the Midway class not to mention all of the smaller Jeep carriers that supported landings as well as provided anti submarine patrols protecting convoys.
Interesting tid bit of information. The Japanese leadership expected the civilian population to have 20 MILLION casualties when the Allies invaded the Home Islands. Those were for civilians not military casualties.



Its a good bet casualties for them meant dead not dead and wounded. Very few Japanese service men or civilians were captured as the US advanced across the Pacific.

I have seen movie footage of civilians in the Marianna's jumping off cliffs to commit suicide.
Many US soldiers and Marines were killed by Japanese soldiers trying to stop the civilians from killing themselves. An allied invasion of Japan would have been a huge blood bath.
Tid Bit 2. The US actually had problems meeting draft numbers during most of the war. Throughout the war the number of drafted men vs planned was short by almost a million men. This led to men being taken from divisions training in the US to be shipped as replacements to front line divisions which was not optimal.
I just saw a photo of a small "sugar loaf" hill and two supporting hills on one of the islands taken by the Marines. It was roughly 30-50 feet tall and maybe a couple of football fields in size. 3,000 Marines were killed and wounded taking that hill. The usual ratio to dead and would is 3-4 wounded to 1 dead. So 750-1000 dead and 2000-2250 wounded. The Marines had artillery, air and tank support taking that position.
An allied invasion of Japan would have been a huge blood bath for both sides. I can't think of any comparison throughout history to what would have happened. The first Allied deaths would have been the POWs in Japan. The guards had orders to execute the POWs when the Allies landed.
Later,
Dan