Military Deployment + Service
Whether you join after residency or as a licensed physician, you will enter Active Duty, Reserve or Guard duty soon after your training. Your specific job will depend on your specialty and the Military's needs at that time, but if you are in the Military, your medical license allows you to practice anywhere.
Regardless of what you do, you will accumulate experience that will serve you well whether you stay in the Military or transfer to the civilian world. In general, you can expect to participate in any of the following three missions: deployment, serving at military medical centers or humanitarian missions.