...A month later, on July 28, Attorney General Mitchell ordered the evacuation of the veterans from all government property, Entrusted with the job, the Washington police met with resistance, shots were fired and two marchers killed. Learning of the shooting at lunch, President Hoover ordered the army to clear out the veterans. Infantry
and cavalry supported by six tanks were dispatched with Chief of Staff General Douglas MacArthur in command. Major Dwight D. Eisenhower served as his liaison with Washington police and Major George Patton led the cavalry.
By 4:45 P.M. the troops were massed on Pennsylvania Ave. below the Capitol. Thousands of Civil Service employees spilled out of work and lined the streets to watch. The veterans, assuming the military display was in their honor, cheered. Suddenly Patton's troopers turned and charged. "Shame, Shame" the spectators cried. Soldiers with fixed bayonets followed, hurling tear gas into the crowd.
By nightfall the BEF had retreated across the Anacostia River where Hoover ordered MacArthur to stop. Ignoring the command, the general led his infantry to the main camp. By early morning the 10,000 inhabitants were routed and the camp in flames. Two babies died and nearby hospitals overwhelmed with casualties. Eisenhower later wrote, "the whole scene was pitiful. The veterans were ragged, ill-fed, and felt themselves badly abused. To suddenly see the whole encampment going up in flames just added to the pity."
http://www.eyewitnesstohistory.com/snprelief4.htm_________________________________
This account glosses over the numbers and types of casualties too.