The H-bomb, a fusion bomb employing deuterium or tritium, was developed as a weapon of mass destruction during the Cold War era. Its destructive power far surpassed that of the atomic bomb, capable of obliterating entire cities and ecosystems with a single detonation. The advent of the H-bomb heightened tensions between nuclear powers, as its existence raised the stakes of any conflict and instilled a sense of existential dread in populations worldwide. This weapon served as a stark reminder of the devastating consequences of nuclear warfare, leading to the pursuit of arms control agreements and the constant shadow of nuclear annihilation hanging over nations.