What is bravery?

I often hear of or see people that are known as brave. Sometimes they are known for constant bravery, and sometimes for single acts of supreme bravery. What is it that makes a person brave?
The first people that I think of when I think of courage are the soldiers that are fighting all over the world. The soldiers outside of their own countries especially. They are doing something to protect the rights, freedoms and opportunities of others. To do something dangerous to benefit others is the first form of bravery.
Another part of being brave is doing something that you don't want to. Once again, the soldiers are excellent examples. They are out there doint something that they would likely rather not, but they do it anyways. They know that it's for a good cause, to help and protect others. Doing something that you don't want to in order to benefit others is the second type of bravery.
Thirdly, I think of people that stand up for others, even if it isn't the "cool" thing to do. They are the ones being cool. They're going against what they world tells them to do (help themselves), and they are listening to their conscience. They are doing what they know is right, which is the third kind of bravery.
When someone gets hurt there are always those who don't panic, but know what to do. My dad is one such person. People like him are able to take potentially scary situations and handle them calmly without changing their mentality. The ability to act normally and calmly in a scary situation is the last kind or part of bravery.
Bravery is made up of several different characteristics and behaviors. A brave person is willing to put themselves in physical or social danger in order to protect others from physical or social harm. They don't panic in scary situations and they do things they're supposed to, even when they don't want to, whether or not others are watching. Truly brave people have integrity and compassion for others.