"My mother isn't a fighter....not physically anyways." Bulma would smack him if she'd heard him say she wasn't a fighter--and he'd deserve it. "She's a strategist though, and a genius inventor. There are small groups that try to fight back, but the two beings shrug off Earth forces."

Closing his eyes, a deep breath in and out and calling on some measure of calm. Of discipline, since she'd asked. "Also, while I'm aware of other planets, Earth doesn't really have much of a presence of any kind of note, that I'm aware of."