The Million Man March had only a tiny fraction of a million people.

The fact that it took two twelve hour days to march the 100,000 man Union Army down Pennsylvania Avenue is a fact of history, easily checked via the Internet. I invite you to introduce some facts into your fantasy world.

All big protest marches in DC start late because the speakers are ranting on long after the 1 PM start time. A body of 40,000 marchers is about three miles long, longer than the route of the march, which means the head of the march arrives at its destination before the tail leaves the starting line. That means that the tail of the march doesn't leave until after 3 PM. If you arrived at 2 PM, you could still wait an hour to join the march.

Face the facts, the Communists who organize the protest marches inflate their numbers wildly, usually by a factor of ten.