India successfully conducted a test of a Submarine-Launched Ballistic Missile (SLBM), likely the K-4 variant, on December 23, 2025. The missile was launched from an Indian SSBN in the Bay of Bengal and is expected to strengthen India’s nuclear triad capabilities. With an estimated range of around 3,500 km, the K-4 enhances India’s strategic deterrence and second-strike capability. The test underscores India’s ongoing focus on modernizing its nuclear forces and securing credible deterrence across