<Li> Branch (Army, Air Force, Navy, Marines) </Li> <Li> Service Number; the first two digits state the starting year of service and the other eight digits state the specific unit of the person . </Li> <Li> Blood group followed by Rh factor </Li> <P> The South Vietnamese Army used two American - style dog tags . Some tags added religion, e.g., Công Giáo for Catholic . They were stamped or inscribed with: </P>

When do you get dog tags in the marines