Question: Who commands the mounted force of the United States today?
Sentence (from "United States Cavalry"): The Cavalry branch became the Armor branch with tanks in 1950, but the term "Cavalry" such as "armored cavalry" remains in use in the U.S. Army for mounted (ground and aviation) reconnaissance, surveillance, and target acquisition (RSTA) units based on their parent Combat Arms Regimental System (CARS) regiment.
Relevant evidence: No