Yes.
A bit of their history from another article:
"In its 105-year history, the 11th Armored Cavalry Regiment has served in the jungles of the Philippines, Cuba and Mexico, where it took part in the last classic-mounted cavalry charge in U.S. history.
In 1919, the regiment received its nickname, Black Horse, from local citizens who took heed of the distinctive black horses the troops used.
The troopers of the 11th Cavalry said goodbye to their mounts in 1941. "
http://www.sbsun.com/news/ci_3614660