Defense could be classified as tactical, theater, or strategic, and could target any of the three phases: boost, mid-course, and terminal.
The first attempt to construct these resulted in the Aggregate Series #9 under Project Amerika, but the first true one to be used was The Digit 7, known in America as "Sapwood". The Hiroc project resulted in the first successful one for the United States, the Atlas A, and later, the backup Titan, but have since then been replaced by the LGM-30 Minuteman, which is currently the only land-based one in use today. Defense could be classified as tactical, theater, or strategic, and could target any of the three phases: boost, mid-course, and terminal. Multiple independently targetable re-entry vehicles are, for 10 points, the modern mainstay warhead model for what class of weapons usually armed with nukes?
The first attempt to construct these resulted in the Aggregate Series #9 under Project Amerika, but the first true one to be used was The Digit 7, known in America as "Sapwood".
{Intercontinental Ballistic Missiles} [or {ICBMs}]