Major Walter Reed was a prominent American army physician known for his groundbreaking work in the early 20th century. He is best remembered for leading the team that confirmed the link between yellow fever and mosquitoes, which was a significant breakthrough in understanding how the disease spread. His research helped to improve public health measures and ultimately saved countless lives. Reed's contributions extended beyond just yellow fever; he played a vital role in the establishment of the Walter Reed Army Medical Center in Washington, D.C. This facility became a key institution for military medicine and research, honoring his legacy and commitment to improving healthcare for soldiers and civilians alike.