India’s Fourth S-400 Squadron: The Sudarshan Shield Grows Stronger
The S-400 is valuable because it changes the geometry of air defence. A conventional air defence system protects a point or a small area; a long-range system like the S-400 creates a wide defensive bubble around strategic zones, air bases, command centres, industrial corridors and border sectors. Its presence forces an adversary to think about distance, altitude, radar exposure, aircraft survivability and missile engagement envelopes before attempting an air operation. In modern warfare, this psychological pressure is as important as the missile itself.