Guglers
... that the Guglers, mercenary knights invading Switzerland in 1375, were so named because of their headwear?
... that the <b id="mwEdE"><a href="./Gugler" id="mwEdI" rel="mw:WikiLink" title="Gugler">Guglers</a></b>,  <a href="./Mercenary" id="mwEdM" rel="mw:WikiLink" title="Mercenary">mercenary</a> <a href="./Knight" id="mwEdQ" rel="mw:WikiLink" title="Knight">knights</a> invading <a href="./Switzerland" id="mwEdU" rel="mw:WikiLink" title="Switzerland">Switzerland</a> in 1375, were so named because of their <a class="mw-redirect" href="./Headwear" id="mwEdY" rel="mw:WikiLink" title="Headwear">headwear</a>?