Can you say the reason the war started was because someone declared it?

Wars usually start over religion or jealousy. Megalomania. Wanting more and more power is all down to pure jealousy for me. Therefore my answer is jealousy!
I didn't choose a OR b because a declaration of war isn't a cause, it's an action.
there's a ton of reason why war starts, but the declaration of war is simply the declaration of a state of action. Its not the reason. They were already at war way before they declared it.
Opinion
2Opinion
Not one person in the USA cannot declare war that can only be done by Congress. There was never a Korean War it was a police action ordered by the U. N. an act of war was never declared by The Congress of the United States. Also, none for Viet Nam!
Which war are you asking about?
No, that’s a formality, not a cause
Superb Opinion