How did they do that?

This is one of the few films that had action sequences so ambitious and well accomplished that I was left scratching my head head as to how they made it work.

I get the same from the Burly Brawl in The Matrix Reloaded - how did they choreograph and film Neo vs countless Smiths?

In Parabellum, I’m wondering how they filmed the horse vs bike fight speeding down a traffic-filled road. Green screen and then add the background?