What information does a Service Record Book primarily contain?

The Service Record Book primarily contains a documented history of a Marine's career activities. This comprehensive record serves as an official account of a service member's enlistment, duty assignments, training received, promotions, awards, and other relevant military milestones throughout their career. It is critical for not only tracking individual progress and accomplishments but also for administrative purposes within the military structure.

The focus on career activities reflects the importance of maintaining an organized and thorough documentation system that aids in evaluation and promotion decisions, as well as providing historical context for the individual service member's contributions to the military. Other areas of interest, such as physical fitness measurements and military education achievements, may be documented elsewhere but do not constitute the primary content of the Service Record Book. Personal hobbies are typically not included as they do not pertain to the official military records and operations.