Benjamin Hardin Helm
...that when Abraham Lincoln's brother-in-law, Confederate Brig Gen. Benjamin Hardin Helm was killed at the Battle of Chickamauga, Lincoln's White House went into mourning?
...that when <a href="./Abraham_Lincoln" id="mwCbM" rel="mw:WikiLink" title="Abraham Lincoln">Abraham Lincoln</a>'s brother-in-law, <a class="mw-redirect mw-disambig" href="./Confederate" id="mwCbQ" rel="mw:WikiLink" title="Confederate">Confederate</a> <a class="mw-redirect" href="./Brigadier_General" id="mwCbU" rel="mw:WikiLink" title="Brigadier General">Brig Gen.</a> <b id="mwCbY"><a href="./Benjamin_Hardin_Helm" id="mwCbc" rel="mw:WikiLink" title="Benjamin Hardin Helm">Benjamin Hardin Helm</a></b> was killed at the <a href="./Battle_of_Chickamauga" id="mwCbg" rel="mw:WikiLink" title="Battle of Chickamauga">Battle of Chickamauga</a>, Lincoln's <a href="./White_House" id="mwCbk" rel="mw:WikiLink" title="White House">White House</a> went into mourning?