Final answer:
The primary purpose of the U.S. interventions in Afghanistan and Iraq during the early 2000s was to counter the threat of terrorism.
Step-by-step explanation:
The primary purpose of the U.S. interventions in Afghanistan and Iraq during the early 2000s was to counter the threat of terrorism. After the September 11 attacks in 2001, the U.S. launched an attack on Afghanistan with the goal of finding those responsible, which marked the beginning of the U.S. war on terror. The invasion of Iraq in 2003 was driven by the belief that Saddam Hussein, the Iraqi dictator, was involved in the September 11 plot and possessed weapons of mass destruction that could be shared with terrorist groups.