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 regular army is the main armed force of the country comprising of personnel who serve full time and maintain a military readiness at all times. The main difference between the reserves and the regular army is that the reserves would normally only train for about a couple of days in a month and in some countries a week in a year. The reserves normally are volunteers who stay in their regular jobs and only work full time with the army when specifically called in to do so.