This challenge is part of the Star Wars temporary Mission that followed the event dedicated to the famous saga. You'll have you to raise a banner on a site under the influence of the First Order Stormtroopers. The challenge isn't difficult in itself, even if you may encounter some unfortunate opponents at the crash sites in question.
Map
It should be noted that banners and Stormtroopers are only "activated" in Solo, Duo or Squad modes. Don't rely on the team Rumble mode to help you complete the challenge quickly! This means that in the coming days, these notable places will become very contested spawns by players, and it will be difficult to access the banner.
The best technique to succeed in this challenge is to land on a notable place or a city near the crash site and to quickly grap some weapons. Once equipped with shields and green or blue weapons, strategically attack the site, paying attention to the players.
The Stormtroopers are quite clumsy and with a good assault rifle in your possession, they won't be able to do anything.
Note that you'll have to slaughter the entire Stormtroopers squad in order to capture the banner!