Who was the seventh commandant of the Marine Corps?

The seventh commandant of the Marine Corps was Jacob Zeilen, serving from 1864 to 1876. His tenure is significant as he was the first commandant to be promoted to the rank of brigadier general, reflecting the growing importance and recognition of the Marine Corps within the U.S. military framework during that era. Zeilen's leadership helped shape the organizational structure and administration of the Marine Corps, setting precedents for future commands.

Understanding this context is crucial as it highlights the evolution of the Marine Corps' leadership and operational capabilities during a transformative period in U.S. military history.