I'm on my second game and wondering about invasions. As I understand it, in order to take over another inhabited planet from another civ, I need
- the planetary invasion tech
- a transport ship (tech required?)
- soldiers to fill the ship (tech?)
- the ability to wipe out any orbiting defense force at the target planet
Once I have all of the above, can the defending planet keep me from taking over by, say, having a defense force on the planet or some defensive building?