The 2nd Cavalry Division is a group of people who work together to protect the United States. They do this by riding on horses or in tanks and other vehicles. They are called the 2nd Cavalry because there are other groups of people who protect the country too, and each group has a number so people can tell them apart.
The 2nd Cavalry is made up of many different kinds of people, all with different jobs. Some people drive the tanks and other vehicles, and some people ride on horses. They train a lot so they can be really good at what they do.
Sometimes, the 2nd Cavalry has to go to different parts of the world to help if something bad is happening there. They might have to help people who are hurt or protect other people from people who want to hurt them.
Overall, they are an important group of people who protect the country and help make sure everyone is safe.