The Indian Navy’s Annual Theatre Level Readiness and Operational Exercise (TROPEX 17) was conducted on the Western Seaboard from 24 Jan 17 till 23 Feb 17. The month long exercise saw participation of over 45 ships from both the Western and Eastern Naval Commands of the Indian Navy, including the aircraft carrier INS Vikramaditya, 05 submarines including the nuclear powered Chakra, 50 Naval aircraft, 11 ships from the Coast Guard, troops from the Army and 20 aircraft from the Air Force including Su 30s, Jaguars and AWACS. The exercise, in complete coordination with the Army and Air Force, was conducted in phases to test the various facets of war-fighting and joint combat capabilities of the armed forces to respond to given threat situations. The Joint Work Up Phase witnessed various weapon firings by ships, submarines and aircraft from both the Indian Navy and Air Force. The 2017 edition of TROPEX included the conduct of large scale ‘Out of Area Contingency’ in island territory, which saw participation of all three services and their special forces. TROPEX 2017 culminated with Tactical Phase conducted over 10 days, and saw intense action by both the opposing forces. The interaction of the forces helped validate operational war fighting concepts and provided valuable lessons to sharpen combat skills. TROPEX 2017 assumes great significance in the backdrop of current security scenario. The exercise provided an apt-opportunity to test the combat capability of the Indian Navy, Indian Army, Indian Air Force and Coast Guard, and strengthened inter-operability and joint operations in complex conflict situation.