Conversation so far:
How was Smuts involved in the second World War?
Smuts had served with Winston Churchill in World War I, and had developed a personal and professional rapport.
Did Smuts fight in WW2?
On 24 May 1941 Smuts was appointed a field marshal of the British Army.

Question: What is Smuts most famous for?
Self-contained rewrite: What is Jan Smuts most famous for?