What do hash marks on the left sleeve of the dress uniform represent?

Hash marks on the left sleeve of the dress uniform indicate years of service, with each hash mark representing four years. The correct answer reflects this standard. When a service member displays hash marks, it serves as a visual recognition of their dedication and commitment to military service, highlighting accomplishments and time spent in the ranks. The tradition of wearing hash marks dates back to historical military practices, reinforcing a sense of pride and history within the armed forces. Lengthy service is thus honored through this prominent feature on uniforms, emphasizing the importance of experience and tenure in the military.