Yes, as said by SS, the most productive way of learning about this sort of thing is just to have a look around; try to understand how the game uses its files. You'll pick it up quickly!
Once you've got the campaign layers up, remember that you can use the time filter on the tools panel to make the map less cluttered (eg only look at the entries for the first half of 1941 or whatever).
You can then left click on a group/unit and right click to see its properties (eg date, unit type, speed), you could also make your own additions (though again, always backup the original file!).
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