Missile Dongfeng DF-4

The development of the Dong Feng 4 was initiated in 1965, a strategic response to emerging ballistic missile submarine threats. This first-generation, two-stage intercontinental ballistic missile, utilizing liquid propellant, was anticipated by external intelligence agencies to achieve initial operational capability around the mid-1970s.

The DF-4 is a two-stage, liquid-fueled intercontinental ballistic missile possessing an operational range sufficient to engage targets across significant portions of Russia, India, and American military installations in the Pacific region. It is engineered to carry a substantial nuclear payload, primarily a single warhead with a reported yield of 3.3 Megatons. An enhanced version, designated the DF-4A, is believed to be capable of deploying three warheads. The missile employs an astro-inertial guidance system, which, characteristic of its era, results in a relatively large circular error probable, thereby affecting its strike precision.

Deployment of the DF-4 commenced in the mid-1970s, with operational assets maintained by the PLA Rocket Force. These missiles were typically stationed in limited numbers, predominantly within underground silos, although some provisions were made for variants that could be rolled out from concealed cave or garage-like structures for launch. The DF-4 has fulfilled a role as a regional deterrent, though its reliance on fixed silo basing is a recognized factor in its overall survivability calculus. It is expected to remain in service until fully superseded by more advanced systems.