I agree with
@Lord Lakely that El Libertador might be the name of his agenda.
Campaña Admirable (Admirable Campaign) sounds more fitting for an ability name. Though I guess either could work.
I think just a combat strength over cities and units whose capital is on another continent is probably the case or if their capital is not on your home continent.
Something to do with War of Liberation would make sense but Robert the Bruce already has that ability, unless they change it.