What describes the purpose of the nuclear triad?

• A. A tripartite alliance of air, land, and sea forces
• B. Land-based ICBMs, strategic bombers, and ballistic-missile submarines providing survivable second-strike capability
• C. A three-stage space-based weapons program
• D. A conventional force framework for asymmetric warfare

Answer: (B)

The nuclear triad is about ensuring a credible, survivable second-strike capability. It does this by distributing nuclear forces across three delivery systems: land-based intercontinental ballistic missiles, strategic bombers, and ballistic-missile submarines. If an attacker were to strike first and try to wipe out one or two legs, the other legs remain able to retaliate, preserving deterrence. Each component brings a strength: ICBMs offer rapid, dispersed response; bombers provide flexible, on-demand targeting and range; submarines stay hidden at sea, making them very hard to detect and destroy. Together they create redundancy and resilience, making a devastating retaliatory option almost unavoidable and thus discouraging a first strike.

Other ideas described space-based weapons, a conventional force framework, or a general alliance, but they don’t capture the triad’s purpose of ensuring a surviving, credible nuclear retaliation across multiple, mutually reinforcing delivery systems.