The alpha now and by extension AH3 has a capture the flag function. If you download the alpha and enter the online arenas you can test this in the capture the flag arena.Both aircraft and GV can capture a flag and try and take it home to win. Or an aircraft could drop the flag on purpose at a multiple country GV spawn. You should ask Hitech how he will allow terrain builders to implement capture the flag. Maybe the AvA guys could place two GV bases near to each other on a GV only map inside of a mega city. There are many new terrain objects than before. Currently Hitech has the AvA guys and everyone else testing the terrain building editor.As for an actual city that can be captured, we have never tested one for Hitech. That doesn't preclude laying down a massive amount of town and village and factories with a GV base in it that can be captured.Download the alpha and check out the cities and TT offline.