The Vietnam War Era — USMC radio telephone operator
FOXHOLE TO FOUR STAR | Article | The United States Army
RTO - "Radio telephone operator (Army) or RO-radio operator (Marines). The person working the radio, usually either in a combat maneuver element or at the TOC (see below)." by AcronymsAndSlang.com
RTO - Radio Telephone Operator
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Radio Telephone Operators, answering the Soldiers' call > U.S. Air Forces Central > Display
Radio telephone operator hi-res stock photography and images - Alamy
US ARMY RADIO TELEPHONE OPERATOR (RTO) TEXT HAT PIN MEASURES 3/4 INCHES | eBay