Some navies could move toward 12-inch cruiser guns. Capital ships with much larger weapons would create more separation between those categories. An illustrative fleet pairs 18-inch capital ships with 12-inch and six-inch cruisers. Destroyer armament remains open. This is a possible development near the 1927 deadline, rather than an immediate or universal prediction.
Notable Point · 53:23-54:17
Could 18-inch battleships leave room for 12-inch cruisers?
Larger capital-ship weapons could widen the distinction between battleships and heavily armed cruisers.