The United States’ involvement in Afghanistan spanned over several years, marked by significant military presence, strategic operations, and attempts at nation-building. The correct answer is option B. 15 years. Since the 9/11 attacks in 2001, the United States initiated military operations in Afghanistan as part of its broader counter-terrorism efforts. The primary goal was to dismantle terrorist networks, including al-Qaeda, and remove the Taliban regime, which had harbored terrorists responsible for the attacks. However, the conflict prolonged, and the United States found itself engaged in a protracted war, facing complex challenges such as insurgency, governance issues, and regional dynamics. Over the years, the U.S. deployed troops, conducted airstrikes, and supported Afghan security forces in combatting insurgents and stabilizing the country. Despite significant investments in military and development efforts, achieving sustainable peace and stability remained elusive. The conflict in Afghanistan became America’s longest war, testing the limits of its military capabilities and geopolitical strategies. In February 2020, the United States signed a peace deal with the Taliban, aiming to facilitate the withdrawal of U.S. troops and initiate intra-Afghan peace talks. Subsequently, in August 2021, after nearly 20 years of military presence, the United States completed its withdrawal from Afghanistan, marking the end of its direct involvement in the conflict. The decision to withdraw sparked debate and raised concerns about the future of Afghanistan, regional security, and the legacy of America’s engagement in the country. While the withdrawal signaled the end of a chapter in U.S. foreign policy, the repercussions of the conflict continue to reverberate, shaping the geopolitical landscape of the region. In conclusion, the United States stayed in Afghanistan for approximately 20 years before completing its withdrawal in August 2021. The decision marked the end of a prolonged military intervention but left behind a complex legacy with lasting implications for Afghanistan and the broader international community.