A unit of African-American soldiers, known as Buffalo Soldiers, were stationed at Fort Brown. White residents of town resented the presence of the black soldiers, and tensions rose. On August 13 and 14, 1906, unknown persons "raided" Brownsville, indiscriminately shooting bystanders. They wounded one white man and killed white resident Frank Natus. The townspeople of Brownsville quickly blamed the black soldiers for the incident. The Army investigated the matter and concluded that the black soldiers were guilty, although their supervising officers supported them and said they had been at the fort. William H. Taft, then President Theodore Roosevelt's Secretary of War and soon to be elected as president, ordered all 168 black soldiers to be discharged "without honor".