The chaos that has been Argentina's lot ever since the ouster of President Arturo Frondizi six months ago was compounded last week by an ugly civil war among the country's ruling military brass. Argentine artillery fired on Argentine tanks; Argentine air force planes strafed Argentine infantrymen. Bewildered civilians wandered through Buenos Aires' streets, sunny in the . South American spring, holding transistor radios to their ears and trying to figure out what they were fighting about.
On one side were army officers who called themselves "Democrats." Occupying nearly all the top military positions in the government,...