Russian drones entered Polish airspace early on Wednesday, leading NATO aircraft to shoot them down. This incident was the first time that NATO forces had to directly engage Russian aircraft in the organization’s history.

The Ukraine war has seen the widespread adoption of drones from both sides. Russian drones have been hammering Ukrainian cities for years. Ukraine has fought back with its own drone forces in strikes such as Operation Spider Web in June, when Ukrainian drones entered deep into Russia and struck vital military installations in their enemy’s heartland.