Section III of the 2015 Cooperative Strategy for 21st Century Seapower (CS-21) details five functions essential to support our National Security (all domain access, deterrence, sea control, power projection, and maritime security).  Select a major region (e.g., INDOPACOM, NORTHCOM, CENTCOM, SOUTHCOM, AFRICOM, or EUCOM) but NOT the one you are currently in, and explain in detail which essential function is the most important for the near term (i.e., 2 to 3 years) regarding our National Security.