Psychiatric and substance abuse hospitals employed only 3,210 security guards, according to the BLS, less than 8 percent of all hospital guards. However, they were the best paid in the industry, earning an average of $35,000, or $16.83 an hour.
So the basic differences between Cavalry, Artillery and Infantry are as follows. 1  Infantry: Infantry refers to the soldiers on foot. 2  Cavalry: It generally means mounted soldiers. 3  Artillery: It uses large and long ranged weapons.
Immediately preceding World War II, the U.S. Cavalry began transitioning to a mechanized, mounted force. During World War II, the Army's cavalry units operated as horse-mounted, mechanized, or dismounted forces (infantry).