As soon as you are enlisted and verbally commit to the United States military, you can no longer back out. You must stay employed with the military for at least four years. This job takes many titles, such as combat specialist, where you would see actual combat, engineering, where you would help design, create, and test different items for the combat specialists to use, and many more. This job is one where you can decide where you want to go, and what you want to do while employed. It is also a job open for advancement, where you can earn higher titles along with higher pay