29 SEP--This Day in US Military History

1919 – The Secretary of War deploys federal troops to Omaha after the preceding day’s rioting.

The race riot resulted in the brutal lynching of Will Brown, a black worker; the death of two white men; the attempted hanging of Mayor Edward Parsons Smith; and a public rampage by thousands of whites who set fire to the Douglas County Courthouse in downtown Omaha.
The riot lasted until 3 a.m., at that hour, federal troops, under command of Colonel John E. Morris of the Twentieth Infantry, arrived from Fort Omaha and Fort Crook. Troops manning machine guns were placed in the heart of Omaha’s business district; in North Omaha, the center of the black community, to protect citizens there; and in South Omaha, to prevent more mobs from forming.
Major General Leonard Wood, commander of the Central Department, came the next day to Omaha by order of Secretary of War Newton D. Baker. Peace was enforced by 1,600 soldiers. Martial law was not formally proclaimed in Omaha, but it was effectively enacted throughout the city. By the request of City Commissioner W.G. Ure, who was acting mayor, Wood took over control over the police department, too.

https://thisdayinusmilhist.wordpress.com/2014/09/29/september-29/