With the law passed, tanks belonged to the infantry branch, so the cavalry gradually bought a group of combat cars, lightly armored and armed tanks that were often indistinguishable from the newer infantry "tanks". In 1933, MacArthur set the stage for the complete mechanization of the cavalry, declaring "The horse has no higher degree of mobility today than he had a thousand years ago. The time has therefore arrived when the Cavalry arm must either replace or assist the horse as a means of transportation, or else pass into the limbo of discarded military formations."
