Conversation so far:
Is there anything interesting about Holland Smith?
Holland Smith is sometimes called the father of modern U.S. amphibious warfare.
Who was Holland Smith?
Holland Smith was a general in the United States Marine Corps during World War II.
What did Holland Smith do?
On the eve of World War II, General Holland Smith directed extensive Army, Navy, and Marine amphibious training.
What did Holland Smith accomplish?
Holland Smith helped prepare U.S. Army and Canadian troops for the Kiska and Attu landings.

Question: When did he come into power?
Self-contained rewrite: When did Holland Smith come into power?