arms race
carrera armamentista
a competition between countries to build more and better weapons, especially nuclear weapons.
Example
During the Cold War, the United States and the Soviet Union built tens of thousands of nuclear warheads.
In Spanish
carrera armamentista — una competencia entre países por fabricar más y mejores armas, sobre todo armas nucleares.
Durante la Guerra Fría, Estados Unidos y la Unión Soviética fabricaron decenas de miles de ojivas nucleares.