The next day I logged in, rebuilt a few levels of buildings, and sent caravans from several cities with resources to help the new city build.  There were no armies anywhere near the new location and the camps at the old location showed as "hostile occupying forces".  However, my military movements page still showed four red armies incoming and well into the trip.

Somehow the blockade, now far away from my city, captured caravans from three different sources between 13:56 and 15:22 with the usual result.  Others escaped the blockade without delivering their cargo to the city.

At 14:34 I captured spies in Blackthorn, interrogated them and found they were sent by dravog, a player whose nearest city is 500 squares away.

At 18:33 one of the newly-built building levels was destroyed by sabotage, presumably also sent long before the city was moved.

At 20:08 I received a mail stating that an attacking army had begun a siege against Blackthorn at location 679|-82 and that it would begin firing at 28 Jan 08:08.  The city is now located at 660|-91.  There is no way the siege camp or the blockades should have any effect.

In short, after paying all of the penalties of exodus such as lost building levels and immobilized armies, the game is still reacting as if the city had never moved.

Ticket # 9628.  I'd really like to see this resolved before the siege camp nukes my town with their ICBMs.  Hopefully with restoration of the captured caravans and repair of any damage due to siege bombardment and and losses due to armies that were already incoming and should not hit the town.

I believe it's fixed for sieges, but not for blockades - am looking into this atm.

Regards,

SC

Siege Update:  The siege camp was also removed, either by the sender or by the patch, I can't tell which came first.  No damage was done.

Incoming Army Update:  Two armies still show as red incoming at Blackthorn.  Two others apparently arrived at the old city location without killing any troops or taking any resources.

Diplo Update:  There haven't been any new attacks.  Presumably any that were part of the original operation would have landed by now.

Thanks for your attention Stormcrow.  Hopefully you can figure out what is happening with the phantom blockades and the diplo attacks.  I don't know how the code works, perhaps if the blockade is tied to a city ID number and that city receives a caravan the code still checks blockade running even if the city is at a new location.  The code may not be checking to make sure the city is currently adjacent to the blockade camp.  The same may be true for the spy and saboteur attacks that I experienced.

The game will allow a player to select a spot for exodus that already has a city located on it as long as that city is owned by a player in the same alliance.  

I were shuffling a couple of cities between various locations.   I tried this with 2 accounts in my alliance and the game accepted both occupied squares as viable exodus spots.  All exodus conditions were met (green text) and the 'Confirm City Move' button can be pressed and the city happily sent on its way!   It will not allow exodus to a square adjacent to one of these cities if Sov has been claimed there. 

Probably the cities don't even have to be in the same alliance as long as they are confed.

@SC, Daufer

Here's some info regarding the attacks my alliance sent to Daufer's town of Blackthorn. It isn't much, but I hope it will help clear things up a bit.

The blockades did intercept vans, though we received no igm's or system notifications about the interceptions. The blockades were recalled, as this was clearly not supposed to happen. (some blockades were set for a few hours and automatically returned home)

I can confirm that I personally dispatched at least one of the armies as soon as the town landed after exodus. Did so to knock out the 20+ catapults that were stuck in the town due to post-exodus rules 

I should also note that the 16 direct attacks you mentioned in the first post, resulted in regular combat reports which indicated that there was nothing at the square. The armies returned home with no resources.