Conversation so far:
What was The Old Boers regarding Jan Smuts?
At the 1913 South African Party conference, the Old Boers (Hertzog, Steyn, De Wet), called for Botha and Jan Smuts to step down.
Why was Jan Smuts called this?
Jan Smuts served as a Boer General during the Boer War

Question: What did he do during this time/?
Self-contained rewrite: What did Jan Smuts do during the Boer War?