The game is played in 5 phases:
[0] Initialization: Refill your hand and collect resources (Oil, Uranium, Influence, R&D) depending on the zones under your control.
[1] R&D: With Research you may unlock Technologies. You may also invest in the Spatial Race.
[2] Political: With Influence, you have a possibility to Destabilise zones or take the Political control of the Destabilised zones.
[3] Production: Then, you may Produce available Units in zones you control that contain a Factory. You may also upgrade units.
[4] Atomic: If the DEFCON level has reached level 1, you may launch nuclear bombs (i.e. if you own the Technology).
[5] Warfare: Finally you may Redeploy units, Launch Attacks on Sea, Bombard, then Redeploy units, Launch Attacks on Land.