Bill I am waiting for this one to go EA on Steam before jumping in. Since I have actually played with miniature ships on the real Olympia my preference is for the early end of the timeline. The part for Pre-Dreads and Dreadnoughts as the title suggests. If you peruse the Game Labs forum you'll find multiple comments about adding carriers and submarines as well as highly technical gunnery discussions involving post 1940 tech. Fingers crossed the devs (Nick T.) do not cave in and stick to the Dreadnought theme. If you ask me the title suggests an earlier break point say 1920s.