When one of your neighbouring regions is attacked, an airfield sends up to 10 planes per level from this region to help defend it, fighters first. Each upgrade level also builds air units in this region 5% faster (up to 45% at level 10).
Cost
15,000
50
75
Construction Time
04:00:00
When one of your neighbouring regions is attacked, a harbor sends up to 1 ship per level from this region to help defend it, the toughest ships first. Each upgrade level also builds naval units in this region 5% faster (up to 45% at level 10).
Cost
25,000
600
150
Construction Time
08:00:00
When one of your neighbouring regions is attacked, a train station sends up to 25 soldiers and 1 tank per level from this region to help defend it. Each upgrade level also speeds up fleets departing this region by 5% (up to 45% at level 10).
Cost
10,000
500
750
Construction Time
03:00:00
Within a barrack you can train troops. Each upgrade level trains troops in this region 5% faster (up to 45% at level 10).
Cost
2,000
100
250
Construction Time
01:00:00
Factory can build armor and mechanized vehicles. Each upgrade level builds tanks and artillery in this region 5% faster (up to 45% at level 10).
Cost
10,000
500
750
Construction Time
06:00:00
Radar stations can detect enemy troop movements. Each upgrade level extends the radar vision range by one extra region and gives the air defence of this region an early warning: +10% defending air power per level.
Cost
50,000
2,500
5,000
Construction Time
10:00:00
Used to build and launch missiles. Each upgrade level builds missiles in this region 5% faster (up to 45% at level 10).
Cost
50,000
2,500
5,000
Construction Time
20:00:00