The Strategic Defense Initiative (SDI), derisively nicknamed the Star Wars program, was a proposed missile defense system intended to protect the United States from attack by ballistic nuclear missiles.

2025年3月5日 · Strategic Defense Initiative (SDI), proposed U.S. strategic defensive system against potential nuclear attacks—as originally conceived, from the Soviet Union. The SDI was first proposed by President Ronald Reagan in a nationwide television address on March 23, 1983.

星球大战计划，亦称星球大战（Strategic Defense Initiative，亦称Star Wars Program，简称SDI。），是美国在20世纪80年代研议的一个反弹道导弹军事战略计划，该计划源自美国总统罗纳德·里根在冷战后期（1983年3月23日）的一次著名演说。

On March 23, 1983 in a televised address to the nation, U.S. President Ronald Reagan announced his intention to embark upon groundbreaking research into a national defense system that could make nuclear weapons obsolete. The research took a number of forms which collectively were called the Strategic Defense Initiative, or SDI.

2018年7月18日 · During the 1980s, President Ronald Reagan initiated the Strategic Defense Initiative (SDI), otherwise known as "Star Wars," an anti-ballistic missile program that was designed to shoot down nuclear missiles in space.

2024年1月21日 · Conceived by President Ronald Reagan in the early 1980s, SDI aimed to develop a space-based defense system to protect the United States from potential nuclear missile attacks. This article delves into the origins, objectives, controversies, and eventual fate of the Strategic Defense Initiative, examining its impact on global geopolitics and its ...

On March 23 rd, 1983, President Ronald Reagan announced the Strategic Defense Initiative, signaling a massive paradigm shift in U.S. policy on nuclear policy. Dubbed “Star Wars” after the 1977 movie, SDI represented Reagan’s rejection of Mutual Assured Destruction.

The US research programme for the Strategic Defence Initiative (SDI), known as 'Star Wars,' is the single most important case of the US technological strategy for a renewed international leadership. Launched by the speech of President Reagan on 23 March 1983, SDI is now a six-year (1984 - 90), $33 billion programme (Pike 1985a: 4).

2019年4月23日 · “Past U.S. efforts to develop and deploy a space-based missile defense have known many names, including Strategic Defense Initiative, Brilliant Pebbles and Global Protection Against Limited Strikes. And all have suffered the same fate: cancellation due to insurmountable financial, technical and strategic obstacles,” he said in an email.

In March 1983, the Strategic Defense Initiative (SDI) was little more than the vision of a president, the hope of the Joint Chiefs of Staff, and the obsession of (a few) scientists. As a practical matter, SDI was a theoretical ambition that was decades and billions of dollars away from being deployed as a defense system.