Darkvision and stealth... and movement order

[Taqwus]

Darkvision: does not affect destealth, according to the manual. It arguably should, given how it would affect the ability of others to take advantage of the cover of darkness. Likewise, darkvision on stealthy troops should be associated with higher stealth -- it's easier for them to take advantage of night and not blunder into a patrol.

One might also conjecture that it would be useful for an army, in terms of being able to steal a march on an enemy -- but this makes more sense if tied to the currently non-existent ability 'need not sleep'.