A 100-year-old US riot only now being talked about

For decades, no name appeared above the grave of Corporal Jesse Moore, only the number seven.

The figure corresponded to noose number seven which was used to hang him and another 12 African-American soldiers beside the Salado Creek of San Antonio in December 1917. 

The executions followed the rainy August night when more than 100 armed soldiers marched into the city of Houston and during a two-hour riot killed 16 whites, including five policemen. 

The resulting court martial staged in three parts was the largest in US military history.