Operation Enduring Freedom (OEF) was the official name used by the U.S. government for the Global War on Terrorism. On October 7, 2001, in response to the September 11 attacks, President George W. Bush announced that airstrikes targeting Al Qaeda and the Taliban had begun in Afghanistan Operation Enduring Freedom primarily refers to the War in Afghanistan, but it is also affiliated with counterterrorism operations in other countries, such as OEF-Philippines and OEF-Trans Sahara.

After 13 years, on December 28, 2014, President Barack Obama announced the end of Operation Enduring Freedom in Afghanistan Continued operations in Afghanistan by the United States' military forces, both non-combat and combat, now occur under the nameOperation Freedom's Sentinel

In response to the attacks of 11 September, the early combat operations that took place on 7 October 2001 to include a mix of strikes from land-based B-1 Lancer, B-2 Spirit and B-52 Stratofortress bombers, carrier-based F-14 Tomcat and F/A-18 Hornet fighters, and Tomahawk cruise missiles launched from both U.S. and British ships and submarines signaled the start of Operation Enduring Freedom.

The initial military objectives of OEF, as articulated by President George W. Bush in his 20 September Address to a Joint Session of Congress and his 7 October address to the country, included the destruction of terrorist training camps and infrastructure within Afghanistan, the capture of al-Qaeda leaders, and the cessation of terrorist activities in Afghanistan.

(AFP) in their push to uproot terrorist forces on the island of In January 2002, over 1,200 soldiers from the United States Special Operations Command Pacific (SOCPAC) deployed to the Philippines to support the Armed Forces of the PhilippinesBasilan. Of those groups included are Abu Sayyaf Group (ASG), al-Qaeda and Jemaah Islamiyah The operation consisted of training the AFP in counter-terrorist operations as well as supporting the local people with humanitarian aid in Operation Smiles.

In October 2002, the Combined Task Force 150 and United States military Special Forces established themselves in Djibouti at Camp Lemonnier. The stated goals of the operation were to provide humanitarian aid and patrol the Horn of Africa to reduce the abilities of terrorist organizations in the region. Similar to OEF-P, the goal of humanitarian aid was emphasized, ostensibly to prevent militant organizations from being able to take hold amongst the population as well as reemerge after being removed.

The military aspect involves coalition forces searching and boarding ships entering the region for illegal cargo as well as providing training and equipment to the armed forces in the region. The humanitarian aspect involves building schools, clinics and water wells to enforce the confidence of the local people.

The operation continues, with military direction mostly coming from United States Central Command.