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The discovery of the technique of modulating a radio-frequency (RF) signal initiated the journey of the ever-evolving military communications field. However, RF modulation was a mere scientific curiosity until hardware improvements and better…

A magnitude 5.1 nuclear test was detected 376 km (234 mi) NE of Pyongyang, North Korea (DPRK) on January 6, 2015 at 10:30 a.m. local time (01:30 UTC), according to the U.S. Geological Survey (USGS). The event was picked up at seismic stations around…

A mine that either passively listens to a target's sound noises, or periodically interrogates its environment by actively emitting acoustic pulses that may return echoes if prospective targets come within range. A mine is an underwater weapon…

An uncrewed, controlled-flight vehicle that is guided to a target by guidance and control equipment. This equipment may be carried in the missile vehicle itself, or guidance may be directed from the launch site. The term is generally reserved for…

Many kinds of aircraft have been designed for highly specialized military applications. Fixed-wing aircraft, rotary-wing aircraft, free-flight balloons, and blimps have all been used in both crewed and crewless flight modes for military purposes.…

When any possible emergency threatens the security or socioeconomic structure of the United States or any political subdivision, an appropriate warning must be made in order for a reaction to occur within an appropriate period of time. Any such…

Surface combatants are required to operate in hostile environments. When underway, combatants are under the constant surveillance of arrays of passive and active sensing devices, designed to detect a range of signals generated or scattered by ships…

The world's navies continue to explore a variety of ship, landing craft, and amphibian vehicle designs to improve amphibious assaults. There has been an evolution over the last 60 years from ships coming close to shore to deliver troops and supplies…

April 22, 2015 was the 100th anniversary of the first large-scale use of chemical weapons in modern warfare. Some of the best minds in chemistry at that time, including a Nobel Prize winner, used their knowledge of science to build humanity’s…

Nerve agents have a surprising history, and it’s just as morbid as you might expect. Although they were not invented as chemical weapons, nerve agents such as sarin have been in use since World War I, and unfortunately are still in use…