What was the Carter Doctrine?

The Carter Doctrine was a foreign policy statement made by President Jimmy Carter in his 1980 State of the Union Address. The doctrine stated that the United States would use military force if necessary to defend its national interests in the Persian Gulf region, particularly against any aggression by the Soviet Union. It marked a significant shift in US policy towards the Middle East and signaled a commitment to protecting the region's oil supplies and preventing Soviet expansion in the area.