Gilbert "Hashmark" Johnson
... that the USMC Sergeant Major Gilbert "Hashmark" Johnson received his nickname because of wearing on the sleeve of his uniform three diagonal stripes (hashmarks), indicating successful previous enlistments?
... that the <a class="mw-redirect" href="./USMC" id="mwAbA" rel="mw:WikiLink" title="USMC">USMC</a> Sergeant Major <b id="mwAbE"><a href="./Gilbert_Johnson" id="mwAbI" rel="mw:WikiLink" title="Gilbert Johnson">Gilbert "Hashmark" Johnson</a></b> received his nickname because of wearing on the sleeve of his uniform three diagonal stripes (hashmarks), indicating successful previous enlistments?