Sorry, I fail to see the comparison. The WW I vets were not tax protesters, they were simply asking to have the date of payment of their rightfully-earned bonus moved up from 1945. You don’t send troops on horseback to charge through an encampment of veterans, many of whom were disabled, out of work, hungry, destroying their tents and belongings and physically chasing them out. The whole affair was shameful.
MacArthur was a pompous ass and should have been fired long before Truman finally did it.
who ordered MacArthur to do that?