original_query: What is the subdivision of the Helladic chronology?
query: What is the subdivision of the Helladic chronology?
answer: The Helladic chronology is subdivided into Early Helladic (EH), Middle Helladic (MH), and Late Helladic (LH).  Each of these periods is further subdivided into phases (I, II, III), and sometimes sub-phases (A, B, C).