Cold War: The Cold War was a long-lasting geopolitical conflict between the United States and the Soviet Union. It greatly influenced Reagan's foreign policy decisions.
Strategic Defense Initiative (SDI): Also known as "Star Wars," SDI was a proposed missile defense system intended to protect the United States from potential attacks by nuclear weapons.
Iran-Contra Affair: A political scandal during Reagan's presidency in which senior officials secretly facilitated the sale of arms to Iran, violating an embargo, with proceeds being used to fund Contras rebels in Nicaragua.