Step-by-Step Guide to the Military’s Immediate Response to 9/11
The immediate military response to the terrorist attacks of September 11, 2001, represented a defining turning point in modern American military history. From fighter pilots scrambling unarmed into uncertain skies to thousands of National Guard soldiers securing Ground Zero, service members demonstrated immediate bravery and adaptability during a national crisis. The structural reforms initiated in the hours and years that followed—including the creation of NORTHCOM, the establishment of the Department of Homeland Security, the operational transformation of the Reserve and Guard, and the passage of the Post-9/11 GI Bill—continue to form the bedrock of today’s defense infrastructure.
September 10, 2026