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.
The Crusades were essentially cavalry wars and sieges, eventually won by the Muslims, and the incredible military success of the Mongols in the 13th cent. was based on their cavalry. At the end of the Middle Ages, infantry came to the fore again but cavalry remained prominent in the armies of Louis XIV, Frederick II (Frederick the Great), and particularly Napoleon.