The question asked was what is the longest continuing Zeta?
A peeing contest is unwarrented. Whether it was closed down for a war effort has nothing to do with it.
The Zeta was either open or closed for what ever reason, Patriotic or not.
That is the question.
It seems two are in the running:
Penn St. or U Cal. At (Berkley)
Maybe it is bragging rights but it is still History.