U.S. Army intervention[edit]
At 4:45 p.m., commanded by Gen. Douglas MacArthur, the 12th Infantry Regiment, Fort Howard, Maryland, and the 3rd Cavalry Regiment, supported by six battle tanks commanded by Maj. George S. Patton, formed in Pennsylvania Avenue while thousands of civil service employees left work to line the street and watch. The Bonus Marchers, believing the troops were marching in their honor, cheered the troops until Patton ordered[citation needed] the cavalry to charge them—an action which prompted the spectators to yell, "Shame! Shame!"
After the cavalry charged, the infantry, with fixed bayonets and tear gas (adamsite, an arsenical vomiting agent) entered the camps, evicting veterans, families, and camp followers. The veterans fled across the Anacostia River to their largest camp and President Hoover ordered the assault stopped. However Gen. MacArthur, feeling the Bonus March was an attempt to overthrow the U.S. government, ignored the President and ordered a new attack. Fifty-five veterans were injured and 135 arrested
