Who commanded more troops than any other Marine General in history?

The correct answer is General Robert E. Cushman, who commanded more troops than any other Marine General in history. His leadership and command during the Vietnam War are particularly noted, where he oversaw significant operations and a large contingent of U.S. Marine forces. Cushman's ability to command such a large number of troops reflects his extensive experience, strategic capabilities, and the trust placed in him by the Marine Corps.

In contrast, while the other generals listed had their own significant contributions and achievements within the Marine Corps, none commanded as many troops as Cushman during their respective tenures. General James Mattis, for example, is well-known for his leadership in Iraq and Afghanistan, but he did not surpass Cushman's record in terms of troop command. Similarly, General Thomas Holcomb played a vital role during World War II but did not match the scale of command that Cushman achieved. General Louis Roberts is known for his contributions but is also not recognized for commanding more troops than Cushman.

Understanding the context of Cushman's command during a major conflict provides insight into the scale and complexity of leadership in the Marine Corps during that period, establishing why he stands out historically in this regard.