The official 11th ACR Facebook page.
General interest:
The Allons Dayroom on Facebook
Vietnam Veterans Memorial Fund on Facebook
Excellent overview of the early history of the 11th ACR on Ancestry.com.
The Official 11th ACR Museum at Fort Irwin
Blackhorse Reunion Information
Blackhorse Regiment Cavalry Motorcycles
German American Friendship Club – Fulda
CavLand, a social network for the 11th ACR
Veterans Writing Project – Website – Facebook
American Legion Newport Harbor Post 291
Sites dedicated to the Camp Doha explosions at Camp Doha, Kuwait on July 11, 1991 involving the 11th ACR and allied units:
Facebook Groups
11th ACR Regiment (Official Page)