Conversation so far:
who was the commander when the american troops joined the allies
In May 1917, General John Joseph Black Jack Pershing was designated the supreme commander of the American army in France, and the American Expeditionary Forces were created.
what else did john j. pershing do besides lead the american expeditionary forces in world war i
John J. Pershing notably served as a mentor to many in the generation of generals who led the United States Army during World War II.

Question: who did the general mentor
Self-contained rewrite: which generals did john j. pershing mentor during world war ii