[Mikkel Plannthin]

I have now found a newspaper reference of a man discharged from 681st Signals and Aircraft Warning Bn on Nov 1945:

Adolph Heintz, 681st Signal and Aircraft Warning Bn., 501 South Washington, Lodi. Wears Good Conduct, Asiatic-Pacific Campaign medals. Served in the Army for three years with 35 months overseas.

So it was not short-lived.

Mikkel