If I were the Vietnamese leadership; I would be thinking, if this this is an example of American leadership no wonder they got their asses kicked by us.
The Vietnamese didn’t kick our asses, they never destroyed even so much as a company size unit, let alone won a battle against us.
The Vietnamese won the war on the evening news, in Congress, on American college campuses and in 5he streets of the US.
They demoralized us and won the propaganda war because of the activities of American traitors.
A formal declaration of war would have prevented the loss of the war.