Have read this:
Toggle unit stats: This option permits the
player to see for each unit its precise supply
level, approximate Strength and Morale
levels (green and blue bars, respectively),
and its in-command star. Hotkey is <a>. (3.4.3.1)
However the bar colours don't seem to make sense.
For example 6th Maine has Strength 664, Morale 2.60/3.50
It looks to me like the green bar is showing almost 50% casualties and morale is under half of the starting value.
Even if you reverse it and it is showing damage/morale taken it still does not reflect actual scores
Here's the unit:





