Hello, I'm a specialist in historical studies with a focus on military conflicts. I'm here to provide you with an in-depth analysis of the longest war in American history. The United States has been involved in numerous wars and conflicts throughout its history. However, the longest war in American history is the War in Afghanistan, often referred to as the Afghanistan War or the U.S. War in Afghanistan. This war began on October 7, 2001, in response to the September 11 attacks and continued until August 31, 2021, when the last U.S. troops were withdrawn from the country. The Afghanistan War was initiated with the goal of dismantling the Al-Qaeda terrorist network, which was responsible for the 9/11 attacks, and removing the Taliban regime from power, who were providing safe haven to Al-Qaeda. The conflict saw the U.S. and its NATO allies engage in a complex and protracted military campaign that involved counterterrorism operations, nation-building efforts, and the training of Afghan security forces. The duration of the Afghanistan War was 20 years and 10 months, making it the longest armed conflict that the United States has ever been involved in, surpassing even the Vietnam War, which lasted from 1955 to 1975, a total of approximately 20 years. During the course of the war, there were several key milestones and shifts in strategy. In 2003, the U.S. shifted focus briefly to the invasion of Iraq, which diverted resources and attention away from Afghanistan. However, the conflict in Afghanistan continued to escalate, with a surge in violence and the rise of the insurgency. In 2009, President Barack Obama announced a surge in U.S. troops to Afghanistan, aiming to stabilize the situation and push back against the Taliban. Despite some initial successes, the conflict remained challenging, with the Taliban maintaining a resilient presence and the Afghan government struggling with corruption and governance issues. The war took a significant toll on the U.S. military and the Afghan people. Thousands of U.S. service members were killed or wounded, and the cost of the war was estimated to be in the trillions of dollars. The Afghan civilian population also suffered greatly, with many losing their lives, homes, and livelihoods due to the ongoing violence. In 2014, the U.S. officially ended its combat mission in Afghanistan, transitioning to a support role for the Afghan government and security forces. However, the situation on the ground remained precarious, with the Taliban continuing to make gains. The final chapter of the war came in 2021, when the U.S. and NATO began a full withdrawal of their forces. This decision was made under the Biden administration, with the goal of ending the U.S. involvement in what had become a seemingly endless conflict. The withdrawal was completed on August 31, 2021, marking the end of the longest war in American history. The legacy of the Afghanistan War is a complex and contentious issue. While the U.S. achieved some of its initial objectives, such as dismantling Al-Qaeda's core leadership and removing the Taliban from power, the long-term outcomes and the future of Afghanistan remain uncertain. The return of the Taliban to power following the U.S. withdrawal has raised concerns about the potential for renewed terrorism and human rights abuses. In conclusion, the Afghanistan War stands as the longest war in American history, a conflict that spanned two decades and had profound implications for the United States, Afghanistan, and the broader international community. The lessons and consequences of this war will continue to be studied and debated for years to come. read more >>

Lengths of U.S. combat forces' participation in warsWarDates1.Vietnam War1955/11 -C 1973/042.War in Afghanistan2001/10 -C present3.Moro Rebellion1899-C19134.Northwest Indian War1785-C179520 more rowsread more >>