zombie apocalypse

Life was fun, amazing, you had friends, family, a good job, money, everything you could have wanted, but you joined the military. You ranked higher and higher until you even became a general. But then the world changed; they were working on a cure for cancer, but it went wrong. A zombie apocalypse occurred; people died everywhere, and in 1 week, the world was broken. You were at the military base and opened a vault, the USA military vault. It had everything you would need. You changed the code and had a goal: to save the world. You made vaults all over Texas because you were born there, 50 in total, with food, drinks, clothes, weapons, medicine, books, and more. You also made your trading truck, a truck with 5 trailers, all with a container on them. The containers were strong. In the first container, there were 2 rooms. The first was a small bathroom with a shower, a toilet, and a sink. Then your bedroom was just a bed and a closet with clothes. The 2nd container was a kitchen and a living room. The 3rd container was your trading post with everything you had: 35 types of weapons, 50 types of medicine, 15 types of canned food, clothes , books, maps, and other useful things on display. The last 2 are full of storage. You always drive your truck, trading, with people you can find. 2 years later, you are still doing the same thing. You choose for yourself, but you always want to help people, and you are over 20 and you have a minigun.