How Did You Get Guaranteed Training in the Military?

I had always admired people who served in the military. And at that point, it felt like our country's under attack. Let me join the military, help defend our country. I was a generator mechanic and where I would be stationed, which was Germany. It takes three or four months of training to learn. But then beyond that, like what I actually did in Iraq when I was there was ran the electricity for 10 cities.