Troops are usually hard to haul, and keeping the barracks around requires alcohol or weapons or munitions. [A building that does not get at least 1 of its demands met will disappear.] But troops do not only appear at barracks, sometimes off duty troops appear at stations with no barracks nearby.
One of the required stations astrakhan near the caspian depression has this strange river - you cannot cross it unless near volgograd. That a bug or a neat feature?
Russia
Re: Russia
The Troops appearing at stations are most likely dropped off from a train that came from a city with a Barracks. Back when I played this scenario I used to run Troop trains direct from Barracks to Barracks, with no intermediate stops. This is the easiest way to get the haulage goal. IMO. 
The river thing may be deliberate, or may be a mistake. Would have to check it out in detail. I haven't played this one for ages.
The river thing may be deliberate, or may be a mistake. Would have to check it out in detail. I haven't played this one for ages.
Complete express car and caboose packs - Custom double tankers (Alternative F era) - Pennsy H3 Consolidation
Слава Україні! Героям слава!
Слава Україні! Героям слава!