Battle of Wanat begins when Taliban and al-Qaeda guerrillas attack US Army and Afghan National Army troops in Afghanistan. The U.S. deaths were, at that time, the most in a single battle since the beginning of operations in 2001.

The Battle of Wanat took place on July 13, 2008, when around 200 Taliban insurgents attacked American troops stationed in the Waygal district of Afghanistan's far eastern Nuristan province. The distant position was primarily defended by United States Army soldiers with 2nd Platoon, Chosen Company, 2nd Battalion, 503rd Infantry Regiment (Airborne), 173rd Airborne Brigade Combat Team.

The Taliban, which also refers to itself by its state name, the Islamic Emirate of Afghanistan, is an Afghan political and militant movement with an ideology comprising elements of the Deobandi movement of Islamic fundamentalism. It ruled approximately 75% of Afghanistan from 1996 to 2001, before it was overthrown by an American invasion after the September 11 attacks carried out by the Taliban's ally al-Qaeda. Following a 20-year insurgency and the departure of coalition forces, the Taliban recaptured Kabul in August 2021, overthrowing the Islamic Republic, and now controls all of Afghanistan. The Taliban has been condemned for restricting human rights, including women's rights to work and have an education. Apart from Russia, the Taliban government is not recognized by the international community.

Al-Qaeda, is a pan-Islamist militant organization led by Sunni jihadists who self-identify as a vanguard spearheading a global Islamist revolution to unite the Muslim world under a supra-national Islamic caliphate. Its membership is mostly composed of Arabs but also includes people from other ethnic groups. Al-Qaeda has mounted attacks on civilian, economic and military targets of the U.S. and its allies; such as the 1998 US embassy bombings, the USS Cole bombing, and the September 11 attacks.

The Islamic National Army of Afghanistan, also referred to as the Islamic Emirate Army, and simply as the Afghan Army, is the land force branch of the Afghan Armed Forces. The roots of an army in Afghanistan can be traced back to the early 18th century when the Hotak dynasty was established in Kandahar followed by Ahmad Shah Durrani's rise to power. It was reorganized in 1880 during Emir Abdur Rahman Khan's reign. Afghanistan remained neutral during the First and Second World Wars. From the 1960s to the early 1990s, the Afghan Army was equipped by the Soviet Union.