of the Oklahoma National Guard arrived by special train at about 9:15 a.m., with 109 troops from Oklahoma City. Ordered in by the governor, he could not legally act until he had contacted all the appropriate local authorities, including Mayor T. D. Evans, the sheriff, and the police chief. Meanwhile, his troops paused to eat breakfast. Barrett summoned reinforcements from several other Oklahoma cities. Barrett declared martial law at 11:49 a.m., and by noon the troops had managed to suppress most of the remaining violence. Thousands of Black residents had fled the city; another 4,000 people had been rounded up and detained at various centers. Under martial law, the detainees were required to carry identification cards. As many as 6,000 Greenwood residents were interned at three local facilities: Convention Hall (now known as the Tulsa Theater), the Tulsa County Fairgrounds (then located about a mile northeast of Greenwood) and McNulty Park (a baseball stadium at Tenth Street and Elgin Avenue). A 1921 letter from an officer of the Service Company, Third Infantry, Oklahoma National Guard, who arrived on May 31, 1921, reported numerous events related to the suppression of the riot: taking about 30–40 Black residents into custody; putting a machine gun on a truck and taking it on patrol, although it was not functioning and much less useful than "an ordinary rifle"; being fired on by Black snipers from the "church" and returning fire; being fired on by white men; turning the prisoners over to deputies to take them to police headquarters; being fired upon again by armed Black residents and having two NCOs slightly wounded; searching for Black snipers and firearms; detailing an NCO to take 170 Black residents to the civil authorities; and delivering an additional 150 Black residents to the Convention Hall. Captain John W. McCune reported that stockpiled ammunition within the burning structures began to explode which might have further contributed to casualties. Martial law was withdrawn on June 4, under Field Order No. 7. Aftermath Casualties The massacre was covered by national newspapers, and the reported number of deaths varies widely. On June 1, 1921, the Tulsa Tribune reported that nine white people and 68 Black people had died in the riot, but shortly afterwards it changed that number to a total of 176 dead. The next day, the same paper reported the count as nine white people and 21 Black people. The Los