May I direct you to my WWII Graphic novel WIP? Shameless plug, I know
http://gwendy85.deviantart.com/gallery/10382807#/d4av2nh
Hi, Gwendy...well, for what they're worth, here are a couple of observations...
The artwork is extremely effective...it's very professional looking and has a lot of personality.
Same goes for the composition, although I might suggest for the sake of story-telling to go more in the direction of panel-by-panel continuity rather than splash pages.
The cover images, although beautifully rendered, do not convey the setting or the time. I'd suggest putting visuals in there that suggests the period and the conflict, even if it's just some Japanese Zeroes flying overhead.
Also...I think this project deserves its own dedicated web-site.
Deviant Art isn't really friendly to casual browsers...your pages took a long time to load and I kept getting redirected to membership sign-up forms.
In my opinion, you should be able place this project with a publisher...visually, it's excellent and is has a unique perspective on a little-known aspect of WWII.
But I think you should set up a better online presentation.