Nearly two decades ago, the U.S. Army Corps of Engineers (USACE) arrived in Afghanistan with a mission rooted in tragedy, forged in urgency, and driven by hope. In the aftermath of the September 11, 2001 terrorist attacks, American forces entered Afghanistan to dismantle al-Qaeda, remove the Taliban from power, and deny terrorist networks a safe haven. What followed was not only a military campaign, but one of the most ambitious reconstruction and infrastructure efforts in U.S. history.