Rod of Asclepius
This shift back to use of the rod of Asclepius to symbolize medicine can also be seen in the United States military. The Army Medical Corps, having popularised the caduceus, while retaining the caduceus for its own plaque and insignia, is now part of the Army Medical Department, which has since adopted the Rod of Asclepius as its main symbol. Furthermore, when the U.S. Air Force designed new medical insignia, it also adopted the rod of Asclepius.