Hearts of Iron series if you haven't covered it yet or if it will exist in your timeline. Naval movies like Midway or Pearl Harbor. That's all I can think of for now.
Space age? Sorry haven't read this in a while, so i got some reading to do :cool:. Still scratching my head on the US dissolution, just kinda seems out of left field for me.
@Burton K Wheeler why not add another ship to the MEU element for the extra forces like another LHD, LHA, LSD or even an update LST. You could even add another rifle company since a Marine battalion can expand to include an extra rifle company.