Being in a reserve is sort of like the National Guard. You do basic training and advanced training, but then you just have to come in for 1 weekend a month and 2 weeks a year for training. It is not a full fledged career, it is a side to your civilian career. You can indeed get deployed, but to my knowledge it is usually in a supporting role, not at the front lines . You do get paid, but not as much as regular troops because you do not put in the time they do.