[MilCom] Historic Land Mobile Use of 380-399.9 mhz Band?

[Ken]

Interestingly a publication “Sacramento County Frequency Outline, 1983 edition”, listed the California Army National Guard as operating a land mobile radio 4 repeater channels/4 talk around channels  allocated in the frequency range 396.5 to 399.75 mhz.  There appeared that there was at least two repeater sites, one in Sacramento and another on Mt Diablo.  The repeater outputs/repeater talk around  were on 399.60/.65/.70/.75 and inputs appeared to be 396.45/.50/.55/.60.

So historically wise, I wonder how long ago (surely before 1983) the military was using the 380-399.9 mhz band for land mobile radio use?

Ken