The Army established or expanded several large military hospitals, including McDougall Hospital and De Camp General Hospital, to serve the growing numbers of wounded and ill soldiers. Among the military innovations coming from New York City was the "Wig-Wag Signaling" system, tested in New York Harbor by Major Albert J. Myer.
The Army created or expanded several large military hospitals, including McDougall Hospital and De Camp General Hospital, to treat a growing number of injured soldiers. The city of New York was also responsible for developing the "Wig-Wag Signaling" system, which was tested in New York Harbor by Major Albert J. Myer.