The United States has a rich history of intelligence in the conduct of foreign relations. Since the Revolutionary War, intelligence has been most relevant to U.S. foreign policy in two ways. Intelligence analysis helps to inform policy. Intelligence agencies also have carried out overt action—secret operations—to influence political, military, or economic conditions in foreign states. The American intelligence community has developed over a long period, and major changes to that community have often occurred because of contingent events rather than long-range planning. Throughout their history, American intelligence agencies have used intelligence gained from both human and technological sources to great effect. Often, U.S. intelligence agencies have been forced to rely on technological means of intelligence gathering for lack of human sources. Recent advances in cyberwarfare have made technology even more important to the American intelligence community. At the same time, the relationship between intelligence and national-security–related policymaking has often been dysfunctional. Indeed, though some American policymakers have used intelligence avidly, many others have used it haphazardly or not at all. Bureaucratic fights also have crippled the American intelligence community. Several high-profile intelligence failures tend to dominate the recent history of intelligence and U.S. foreign relations. Some of these failures were due to lack of intelligence or poor analytic tradecraft. Others came because policymakers failed to use the intelligence they had. In some cases, policymakers have also pressured intelligence officers to change their findings to better suit those policymakers’ goals. And presidents have often preferred to use covert action to carry out their preferred policies without paying attention to intelligence analysis. The result has been constant debate about the appropriate role of intelligence in U.S. foreign relations.
Thomas A. Reinstein
Timothy Andrews Sayle
In March 2003 US and coalition forces invaded Iraq. US forces withdrew in December 2008. Approximately 4,400 US troops were killed and 31,900 wounded during the initial invasion and the subsequent war. Estimates of Iraqi casualties vary widely, ranging from roughly 100,000 to more than half a million. The invasion was launched as part of the US strategic response to the terror attacks of September 11, 2001, and ended the rule of Iraqi President Saddam Hussein. After the collapse of the regime, Iraq experienced significant violence as former regime loyalists launched insurgent attacks against US forces, and al-Qaeda in Iraq (AQI), a group linked to al-Qaeda, also attacked US forces and sought to precipitate sectarian civil war. Simultaneously with the increasing violence, Iraq held a series of elections that resulted in a new Constitution and an elected parliament and government. In 2007, the United States deployed more troops to Iraq to quell the insurgency and sectarian strife. The temporary increase in troops was known as “the Surge.” In November 2008, the US and Iraqi governments agreed that all US troops would withdraw from Iraq by December 2011. In 2014, AQI, now calling itself the Islamic State of Iraq and the Levant (ISIL), attacked and captured large swaths of Iraq, including several large cities. That year, the United States and allied states launched new military operations in Iraq called Operation Inherent Resolve. The government of Iraq declared victory over ISIL in 2017.
Mary S. Barton and David M. Wight
The US government’s perception of and response to international terrorism has undergone momentous shifts since first focusing on the issue in the early 20th century. The global rise of anarchist and communist violence provided the impetus for the first major US government programs aimed at combating international terrorism: restrictive immigration policies targeting perceived radicals. By the 1920s, the State Department emerged as the primary government agency crafting US responses to international terrorism, generally combating communist terrorism through diplomacy and information-sharing partnerships with foreign governments. The 1979 Iranian hostage crisis marked the beginning of two key shifts in US antiterrorism policy: a heightened focus on combating Islamist terrorism and a willingness to deploy military force to this end. The terrorist attacks of September 11, 2001, led US officials to conceptualize international terrorism as a high-level national security problem, leading to US military invasions and occupations of Afghanistan and Iraq, a broader use of special forces, and unprecedented intelligence-gathering operations.