For the pilots of the Tang Army, attacking a zeppelin, such a gigantic target, was practically a form of entertainment.
The Butcher Fighters turned in the sky and easily slipped in above the airship, a position where enemy fire couldn't reach and where they could relentlessly attack the most vulnerable part, the top gasbags.
Knowing their target before taking off, the entire squadron of fighters was equipped with Tracer Bullets, which could ignite the hydrogen in the airship's gasbags. Although not as effective as incendiary rounds, they were much better than regular bullets.
At that time, Air Force ammunition didn't have incendiary bullets because there was no extensive need. So they had to make do with Tracer Bullets, which actually had a similar effect.
A Butcher Fighter thus dived in close, beginning to strafe along the spine of the airship at an extremely close range.
