This last ones is a little change on Gilbert Island.
If 1942 is the starting date, Gilbert Islands were invaded at the same time as Pearl Harbor Raid.
To be consistent, this have to be corrected.
It is same as my precedent picture in PTO.
The most interesting basis is about Iwo Jima sharing the same SZ as Japan.
Capturing Iwo Jima allows US escorting Fighters against Japan to be launched and landed in this island.
And I duplicated this feature somehow with Vancouver Island placed in between 2 SZs :
SZ64 and SZ55, and if captured, allows Japan to launch Fighters from this island into West USA or Western Canada.
These islands in various Pacific SZs clearly showed how Japan may try to put in place an Outer Defense Perimeter.
Also, USA can do an effective Islands hopping from Hawaii toward Gilbert Islands, Marshall Islands and Marianas.
Or directly from Hawaii toward Marianas to capture a way point to launch bombers on Japan.
These islands in PTO SZs allows the possibility to work in a similar way as it was done in WW2.