section_path: History/Modern history/World War II and postwar
section_name: World War II and postwar
paragraph_text: World War II and postwar
  
  Many modern military weapons, particularly ground-based ones, are relatively minor improvements to weapon systems developed during World War II. World War II marked perhaps the most frantic period of weapon development in the history of humanity. Massive numbers of new designs and concepts were fielded, and all existing technologies were improved between 1939 and 1945. The most powerful weapon invented during this period was the nuclear bomb; however, many other weapons influenced the world, such as jet aircraft and radar, but were overshadowed by the visibility of nuclear weapons and long-range rockets.