Battle Staff

Reference: FM-I 4-90.1, pg. 3-2 to 3-3. Paragraphs 3-4 through 3-7 refer to the “battle staff.”
Issue: The term “battle staff” is periodically mentioned in FM-I 3-90.5 and FM-I 3-90.6, but it is not defined, not even in context. No reference to “battle staff” is made in FMs 1-02, 3-0, 4-0, or 5-0. [Paragraph 3-6 of FM-I 4-90.1 indicates that the duties and responsibilities of battle staff officers can be found in FM 5-0. This is not true.]
Question: What does the term “battle staff” mean?

CADD says: The consensus so far is that it's simply a more sexy term for "staff." It refers to the commander's core war-fighting staff, the core decision-makers. The author of FM 5-0, Army Planning and Orders Production, informs us that they are going to try to come up with a definition when the manual on TTP for CP operations is written.