Amateur Radio, its past and present, is referenced here — https://www.arrl.org/ham-radio history#:~:text=In%201914%20the%20American%20Radio,took%20place%20on%201296%20MHz.
Santa Clara County ARES / RACES provides ongoing training and events; see the following website for a comprehensive guide to their services — https://www.scc-ares-races.org/aresraces.htm#gsc.tab=0