Conversation so far:
When was Erich Ludendorff with Hindenburg?
Erich Ludendorff was with Hindenburg on 29 August 1916
What rank was Erich Ludendorffduring 1916?
Erich Ludendorff was again his chief of staff as first Quartermaster general, with the stipulation that he would have joint responsibility.

Question: What was his role as chief of staff?
Self-contained rewrite: What was Erich Ludendorff role as chief of staff?