History of Vietnam since 1945 unstable as no government could keep power for long. There were more coups, often more than one every year. The Communist-run Viet Cong expanded their operation and scored some significant military victories during this period. In 1965, US President Lyndon Johnson sent troops to South Vietnam to secure the country and started to bomb North Vietnam, assuming that if South Vietnam fell to the Communists, other countries in the Southeast Asia would follow, in accordance with the domino theory. Other US allies, such as Australia, New Zealand, South Korea, Thailand, the Philippines, and Taiwan also sent troops to South Vietnam.
Air Defence Troops of the Russian Ground Forces km, of short range – up to 30 km, of medium range – up to 100 km, of long range – of more than 100 km. Further development of the Air Defence Troops of the GF is carried out by improving mobility, survivability, covertness of operation, automation’s degree, fire efficiency, expanding parameters of the affected area, reducing the response time and the mass-dimensional characteristics of the guided missile (rocket-artillery) systems. Air Defence Troops of the Russian Ground Forces The Air Defence Troops are an Arm of the Russian Ground Forces, intended to cover troops and facilities from means of air