Troops vs. Non-populated colonies

[Saracen]

I think when you kill off all the population the status of the planet changes to "colonizable" and the only way you can take it is with a colony ship as you do with all uninhabited planets.

[geoschmo]

No, if you try to colonize a zero poulation colony you will get a message that you can't colonize. That's as it should be. But you should be able to drop troops on a zero population colony in strategic. If you can't it sounds like you found a bug. I would suggest sending that and a savegame to Malfador.

Geoschmo