dedicated aviation arm
...that while other nations have marine aviators, only the United States Marine Corps has their own dedicated aviation arm?
...that while other nations have <a class="mw-redirect" href="./Marine_(military)" id="mwDc4" rel="mw:WikiLink" title="Marine (military)">marine</a> aviators, only the <a href="./United_States_Marine_Corps" id="mwDc8" rel="mw:WikiLink" title="United States Marine Corps">United States Marine Corps</a> has their own <b id="mwDdA"><a href="./United_States_Marine_Corps_Aviation" id="mwDdE" rel="mw:WikiLink" title="United States Marine Corps Aviation">dedicated aviation arm</a></b>?