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.
About the Infantry. The infantry is the main land combat force and backbone of the Army. It's equally important in peacetime and in combat. The Infantryman's role is to be ready to defend our country in peacetime and to capture, destroy and repel enemy ground forces during combat.