[Chewbacca]

Weren't they something like 14 inches.

Ohio class was 16 inch, and Yamato class was 18 inch.

[KarlInOhio]

Ohio class was 16 inch,

Ohio class? Maybe you're thinking of another midwestern state with lots of vowels. Iowa, perhaps?

There have been two battleships named Ohio. BB-12 (Maine class) launched 1901, commissioned 1904, finally decommisioned 1922.

BB-68 (Montana class) authorized 1940, cancelled 1943 before construction started.