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.
Infantry is still in existence, because that was our main approach at Iraq. Cavalry exists in the form of cars in place of horses. Navy definitely exists: There's a whole bran â¦ ch in the military for that. There are two types of cavalry still in existence-armoured cavalry, and air cavalry. The infantry element of an air cav unit was replaced by air assault infantry, but attack and scout helicopter formations are still part of air cav. 1 person found this useful.