This is the insignia of 6th U.S. Cavalry. Sorry to lead with a Wikisource, but the information is reliable in this case:
http://en.wikisource.org/wiki/Wikisource:Workspace/US_Army_Lineage_and_Honors/US_6th_Cavalry_Regiment
If you would prefer an official source, here is the U.S. Army Center for Military History:
http://www.army.mil/CMH/html/forcestruc/lineages/branches/cav/006cv.htm
6th Cavalry was in ETO when your father was there but I can see no direct evidence on your site that he was assigned to this unit. Attached perhaps. Maybe he brought this badge home as a souvenir.
ahinahina_at_gmail.com if you want to contact me.
From: Wailuna
Date: Wed Oct 31 00:55:38 2007
This is the insignia of 6th U.S. Cavalry. Sorry to lead with a Wikisource, but the information is reliable in this case: http://en.wikisource.org/wiki/Wikisource:Workspace/US_Army_Lineage_and_Honors/US_6th_Cavalry_Regiment If you would prefer an official source, here is the U.S. Army Center for Military History: http://www.army.mil/CMH/html/forcestruc/lineages/branches/cav/006cv.htm 6th Cavalry was in ETO when your father was there but I can see no direct evidence on your site that he was assigned to this unit. Attached perhaps. Maybe he brought this badge home as a souvenir. ahinahina_at_gmail.com if you want to contact me.