just found this while searcing the web. I wasnt aware the the 2nd Cavalry Division was a "racially" mixed unit.
Half "White" and half "Colored". It didnt last very long it looks like.
"In addition to the mechanized cavalry, the US Army fielded a number of horse-cavalry units during the war, including the 1st and 2nd Cavalry Divisions and the 56th Cavalry Brigade with the 112th and 124th Cavalry Regiments (Texas National Guard), and the 26th Cavalry Regiment (Philippine Scouts). Of these, only the 26th Cavalry fought mounted, during the Campaign in the Philippines in 1941 and 1942. The 1st Cavalry Division, the 112th and 124th Cavalry all were sent to the Pacific, where they fought dismounted as infantry. Finally, the 2nd Cavalry Division was originally activated in April 1941 as a racially mixed division, with one 'Colored' Cavalry Brigade and one 'White' Cavalry Brigade. It was inactivated in July 1942 only to be reactivated in February 1943 as a 'Colored' Division. It was sent to North Africa where it was inactivated again in May 1944 with its personnel reassigned to service and engineer labor units."
http://www.militaryhistoryonline.com/wwii/usarmy/cavalry.aspx