What did alexander hamilton argue about war in federalist no. 69? a surprise attack on the united states is the only justification for war by presidential action. building a strong military for engagement in foreign wars would be a key ingredient to establishing executive authority. a president should be allowed to declare war, because only the executive can react quickly enough. war under any circumstances is unjust, even in self-defense. congress is the only body with enough deliberative powers to be able to justly declare war?