Puzzle 2

Same deal as Puzzle 1: This is the hierarchy of a single army unit in a specific moment in time. It is arranged in rank order, top to bottom. The images are catch-as-catch-can, not indictative of the historical period. Everyone here eventually commanded above corps level.

Without googling, can you (a) identify every person shown? (b) identify this unit?

Puzzle 1 can be solved by any regular reader of this blog. Puzzle 2 is harder - this unit has had only the briefest mention here previously. Fun fact: these were not transitional organizations. The teams you see here worked together for many years in the hierarchies displayed.

Answers to both puzzles (with commentary) tomorrow.