The 1985 reorganization also made significant changes in the armed forces chain of command. The four multi-service Regional Defense Commands ("Kowilhans") and the National Strategic Command ("Kostranas") were eliminated from the defense structure, establishing the Military Regional Command ("Kodam"), or area command, as the key organization for strategic, tactical, and territorial operations for all services. The chain of command flowed directly from the "ABRI" commander in chief to the ten "Kodam" commanders, and then to subordinate army territorial commands. The former territorial commands of the air force and navy were eliminated from the structure altogether, with each of those services represented on the "Kodam" staff by a senior liaison officer. The navy and air force territorial commands were replaced by operational commands. The air force formed two Operational Commands ("Ko-Ops") while the navy had its two Fleet Commands, the Western and Eastern Armadas. The air force's National Air Defense Command ("Kohanudnas") remained under the "ABRI" commander in chief. It had an essentially defensive function that included responsibility for the early warning system.