I believe Governor Romney made it precisely clear that any war of any type or kind should be deemed necessary, and as a last resort; invoking his likeness for Ronald Reagan's abilities, as well as, his superior wisdom while responding to a similar question in his interview with "Face the Nation." Maybe Governor Romney took it upon himself to make it clear (precisely) with regard to his opinion on the matter/issue in which I am currently discussing with you. However; Gov. Romney did in fact provide understanding of the question you had posted regarding the necessity of war, as of the effective dates of his speech and interview with "Face the Nation."
I want to respond to your affordability question if war was indeed necessary.