![](https://random-writings.com/wp-content/uploads/2021/03/k40_eindekker.jpg)
Fokker began installing machine guns with interrupter gears on his Fokker Eindekker (one wing) aircraft, making it the first production aircraft which we would call a fighter. (At the time it was called a pursuit or chasse (hunting) plane.) (Wikimedia Commons https://commons.wikimedia.org/wiki/File%3AFokker_M5K-MG_E5-15.jpg)