About two hours later, four troops of cavalry, four companies of infantry, a mounted machine gun squadron and six whippet tanks lined up on Pennsylvania Avenue near 12th Street. Some of America's greatest military minds were on hand. MacArthur, the commander, was there with Maj. Dwight D. Eisenhower and one of his officers, George S. Patton Jr.
It does not state that they fired.
They used gas to rout them out.
Perfectly acceptable actions by a president and the Federal government then. I understand your position and there’s no further need for you to defend it.