The other night the rooks were deep into bish land so I figured I would go pork the troops/ord  at several of the bases on bish home turf. I didn't realize how ever that ALL zones were removed, somehow I was under the impression that each country still retained it's own zone while all smaller zones were removed.    So I was running flight after flight of B-26's bombing strat at 1 base and returning to base to get another flight and by the time I could go to pork the same base some more the strat I had just hit was already up..   Being in B-26's that operate at a much lower alt than 17's I figured I could pork these bases fairly quickly and have them stay down forcing rooks to resup them if they wanted to continue rolling fields, all the while sending rook after rook back to base for replacement radiators and engines.  
  
 Unfortunately with no home county zone the rooks strat city resups base strat on any base they owned weather or not it was home turf or not.  Even with coordinated efforts between between myself and the 91st bomb group we were unable to keep strat down on 2 bases long enough to see any effect at all. 
  As far as I can tell the strat cities are a good addition though like some others have said they seem a lil far some times but the lack of even 1 zone per country to limit the reach of enemy strat repair into an enemy country I find it seems to have even less effect than it did before the change.   
Here's the blurp from the directions:  The basic categories of strategy targets in Aces High include field targets, zone targets, city targets, and supply targets.
The field targets affect availability of field items such as planes, fuel, ammo, etc.  Every tower has a chalkboard displaying the field number and the current status of the field targets.
The zone targets are the factories that affect the resupply of field targets. 
The city targets are the buildings within a city and they affect the resupply of the zone targets.
The supply targets are the trains, convoys, and barges that resupply damaged fields and factories.  
Strategic targets     
Target type   Target   Destroy with   Downtime   Effect   Supplier   Can be
resupplied
Field   Map room   10 troops   N/A   Captures field   N/A   No
Guns   1 100 lb   2 hours   Kills field ack   AAA factory   Yes
Radar   1 250 lb   2 hours   Kills field radar in a 12.5 mile radius   Radar factory   Yes
Ammo   1 250 lb   2 hours   Reduces bomb/rocket
loadout to zero   Ammo factory   Yes
Fuel   1 250 lb   2 hours   Reduces maximum
allowed fuel load   Fuel refinery   Yes
Barracks   1 250 lb   2 hours   Reduces troop loadout
to zero   Training facility   Yes
Fighter hangar   3 1000 lb   15 mins   Disables fighters at
the field   N/A   No
Bomber hangar   3 1000 lb   15 mins   Disables bombers at
the field   N/A   No
Vehicle hangar   3 1000 lb   15 mins   Disables vehicles at
the field   N/A   No
Shore battery   4 1000 lb   15 mins   Disables shore battery at the field   N/A   No
Town building   1 250 lb   45 mins   Kills town building to
allow for field capture   N/A   No
Zone   HQ   37 1000 lb   2 hours   Kills all radar for a
country   City building   Yes
AAA factory   1 250 lb   3 hours   Loads supplies for
field guns   City building   Yes
Radar factory   1 250 lb   3 hours   Loads supplies for
field radar   City building   Yes
Ammo factory   1 250 lb   3 hours   Loads supplies for
ammo at fields   City building   Yes
Fuel refinery   1 250 lb   3 hours   Loads supplies for
fuel tanks at fields   City building   Yes
Training facility   1 250 lb   3 hours   Loads supplies for
barracks at fields   City building   Yes
City   City building   1 250 lb   3 hours   Loads supplies for
factories and HQ   City building   Yes *
Supply   Train   1 100 lb   N/A   Stops train from
resupplying destination   N/A   N/A
Convoy   ½ 100 lb   N/A   Stops convoy from resupplying destination   N/A   N/A
Barge   ½ 100 lb   N/A   Stops barge from
resupplying destination   N/A   N/A
Ships   Primary ship   8 1000 lb   5 min   Sinks task group,
respawns at port   N/A   No
Other ships   2 1000 lb   1 hour   Sinks ship   N/A   No
Special Types   Barrier   N/A   N/A   Barrier   N/A   N/A
Structure   1 250 lb   45 minutes   An object any country can destroy   N/A   No
*  Each drop of convoy or train supplies on damaged city targets reduces the 3 hour downtime by 30 minutes.  Each drop of player supplies reduces the downtime by 15 minutes.
I asked HTC about this and was told that it works.  And as long as I have played, I've never seen a result at the base level which would lead one to the same conclusion.  However, I was told to get the 5 hour base level down time of, oh let's say ammo at an airfield, 3 things have to happen: City = 0%, Ammo Factory = 0, and a base that is fed by those two is porked.
Even so, it is still fun to get up there and see what can be done.  But it would be quite nice to be better rewarded for our efforts.