Dell has junior treasury with stuff like aladdin, gulliver, tom sawyer, etc:
http://digitalcomicmuseum.com/index.php?cid=1109As far as military comics, you can find many of them by going to the site's main page, hitting ctrl+f and then searching for military, war, army, fightin, navy, etc. All the subcategories for various comics are listed right on that page (although each main category tends to have a bunch of individual comics which haven't been categorized & those won't appear on the main page).
You can also look around on DCM's sister (ish?) site
http://comicbookplus.com/?cid=1507 most of the comics are the same there as here, but they also include some silver age stuff.