I believe, if I'm not mistaken they also created a weapon called "nest of bees" basically it was a storage container and all they did was light the fuse and nearly 100 arrows flew in all directions (straight of course)it was the beginning of rocket propelled weapons. To get more into depth, the arrows contained a "pocket" of some sort and this "pocket" would hold gun powder that propelled the arrows. It was an effective weapon if it hit it's mark but, it was very inaccurate making this weapon very unpredictable. :-P