They'll be more "Police Actions", "Humanitarian Relief Missions", "Peace Keeping Missions", "Special Authorizations", etc..
The last delcared war was WWII. Everything since have been extra-Constitutional executive actions or congressional authorizations.
Peeps in DC don't get law degrees to follow the law; they get law degrees to find ways around the laws.
Laws are empty words on pieces of paper. Appropriation bill "Frameworks" are empty pieces of paper that get filled in after they are passed.