I'm hoping for a quick answer - can enemy scouts/spies detect stealthy units, with a "hide" order (including stealth units under their command), in your own territory?
I'm just thinking about the ability to mass stealthy units (I know, most of them suck, but not all) undetected on a neighbor's border, either to spring a trap if you suspect an invasion, or if you wish to pull a surprise attack of your own (and violate that NAP in a major way

).
Is that feasible? Are there other ways for an enemy to 'indirectly' detect hidden stealth units in your own territory (something to do with supply, perhaps?)?