Is this a bug?, cheese? or a legitimate tactic?
I just tried this and it works on beta 3 . If you send one transport 1000 troops and do core detonation and mass drivers they can sacrifice themselves but kill 4x5 times the defending troops because of the mass driver/core detonation bonuses. After they can kill off most/some of the defending troops, but still lose, the planet doesn't suffer any penalty (because you haven't conquered it), But then you can just fly in a new large invasion fleet using tradtional invasion tactics and beat up on the greatly reduced garrison and conquer the planet. You get to reduce the garrison using the MD/CD tactics but don't suffer any penalty unless you misjudge and you sacrificial MD/CD attacks are misjudged and you actually conquer the planet by mistake?
Is multiple invasions per turn a legitimate tactic?