Lt. Henry B. Hidden
... that Lt. Henry B. Hidden is believed to be first officer of Union volunteer cavalry killed in the American Civil War?
... that <b id="mwFjY"><a class="mw-redirect" href="./First_Lieutenant#United_States" id="mwFjc" rel="mw:WikiLink" title="First Lieutenant">Lt.</a> <a href="./Henry_B._Hidden" id="mwFjg" rel="mw:WikiLink" title="Henry B. Hidden">Henry B. Hidden</a></b> is believed to be first officer of <a href="./Union_Army" id="mwFjk" rel="mw:WikiLink" title="Union Army">Union</a> volunteer <a href="./Cavalry" id="mwFjo" rel="mw:WikiLink" title="Cavalry">cavalry</a> killed in the <a href="./American_Civil_War" id="mwFjs" rel="mw:WikiLink" title="American Civil War">American Civil War</a>?