Conversation so far:
What was Holland Smith's role in World War II?
After the latter assignment, General Holland Smith assumed command of the 1st Marine Brigade at Quantico, taking that unit to Guantanamo Bay, Cuba.
What did Holland Smith do at Guantanamo Bay, Cuba?
General Holland Smith assumed command of the 1st Marine Brigade at Quantico, taking that unit to Guantanamo Bay, Cuba, for extended amphibious training in October 1940.
What accomplishments did Holland Smith have during WWII?
General Holland Smith directed extensive Army, Navy, and Marine amphibious training, which was a major factor in successful U.S. landings in both the Atlantic and Pacific.

Question: What is significant in his life during WWII?
Self-contained rewrite: What is significant in Holland Smith's life during WWII?