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.
Cavalry rides to the battle and fights mounted. Traditionally on horseback, but motorized with humvees and helicopters nowdays. Infantry walks to the battle and fights on foot. But today, they may get to the front by truck, airplane, etc.