These enumerations are common to a number of different files.
Image group for battlefield images and animations.
Usually represented as three characters followed by a null,
although in some places spaces are used instead of nulls.
An initial 'E' stands for a non-player human, an 'M' for a nonhuman.
The current menu of options.
This defines which menu of options you get
(which determines the background image and possibly the music).
Any place there is a menu is represented in here:
in-city menus, encounters, talking to the miners, even the iron doors in the mines.
These definitions may be stored in the executable; they haven't been found elsewhere.
A 'strings' of darkland.exe reveals a bunch of names that look like the menus, in the appropriate order, but no simple structure was apparent -- other binary data was in there too.
These are possibly called 'cards' internally to the game.
When travelling on the map, 0x0c is used (which isn't really a 'menu of options').
Calendar month.
Months are zero-based