At this point, it's entirely possible to be a legal adult in the United States and to have spent your entire life in a period when U.S. forces were active in Afghanistan.
According to to The Washington Post, not only is the war in Afghanistan the longest waged in American military history, but it has resulted in the deaths of over 2,000 U.S. personnel and at least 100,000 Afghan civilians while also costing the United States trillions of dollars.
But based on reports from within President Joe Biden's administration, it seems the nation's involvement in the conflict will draw to a close before the year is out.