The encirclement of Nancy, which took place in September 1944 during World War II, was a significant military operation in the Allied advance through France following the Normandy landings. The operation involved elements of the U.S. Third Army, under the command of General George S. Patton, and aimed to liberate the strategically important city of Nancy from German occupation. The encirclement, achieved through a rapid armored thrust, effectively trapped a significant German force and paved the way for the liberation of Nancy on September 15, 1944. The operation demonstrated the effectiveness of American armored warfare and further weakened German defenses in northeastern France.