Take your time, we'll wait...
If thats your problem, that horse has left the barn long ago. You can blame President McKinley I suppose, and Teddy Roosevelt after him, as they between them created Cuba, the Philippines, Panama, etc.
You do not even have to get to the Articles. It is right there in the Preamble:
".... provide for the common defense ...."
After victory in World War One, the U.S. washed its hands of Europe and the future of Germany and, 23 years later, we needed to fight a still militaristic and aggressive Germany all over again at the cost of hundreds of thousands of additional American combat deaths.
After World War Two, the United States decided to turn both Japan and West Germany into Peacenik nations whether Japan and West Germany wanted that or not. The Japanese Constitution was written by MacArthur's staff and it was crammed down the Japanese throats.
Twenty five years later, in the 1970's we did not need to fight the Japanese or the Germans in another war, did we?
Fifty years later, in the 1990's we still did not have to fight either the Germans or the Japanese in another war, did we?
In regards to the Persian Gulf, see Post 37.
Unless we screw thing up, 25 years from now in the 2030's, our kids will not have to talk about how, in 2026, New York City, Washington, DC, Chicago and a few other major American cities were obliterated in an Iranian nuclear strike before the Iranian mullahs were obliterated twenty minutes later and went to Paradise after a U.S. retaliatory nuclear strike.
THAT is what it means to ".... provide for the common defense ....".
The Constitution authorizes broad powers. It does not anal-retentively micromanage such powers. That is why we do not need a Constitutional Amendment to establish a U.S. Air Force when some would argue:
"Quote me the clause in the Constitution authorizing ANY Branch of the government to set up an Air Force. The Constitution says absolutely nothing about aircraft or Air Forces."