Expansion doesn't block asset conflicts so probably doesn't block invasion conflicts either - but here the catch would be that you can't invade versus a controlling faction, so either you'd require a non-controlling expander (which wasn't triggering the lower coup threshold for control instead), or to quickly run two conflicts - one to drop them out of control, then another for the invasion.[2] if non-native it might be possible to invade a faction in expansion and win the invasion before expansion happens. it might also be not possible, if expansion blocks invasion. as that would require a lot of ifs i know of no exampel to prove one or the other.