A handful of grass is regarded as a weapon.
This is a martial arts novel. A martial arts novel about a legendary woman.
Grass and trees are all soldiers, this is an idiom.
Fu Jian of the former Qin Dynasty led his troops to attack the Eastern Jin Dynasty. They entered the Feishui River Basin and climbed to the Shouchun City for a lookout. He saw the Jin army's formation in a tight formation. He also looked at Bagong Mountain in the distance and thought that all the vegetation on the mountain was the Jin army. He was frightened. It is also described as being intimidated by the opponent's momentum and becoming suspicious and delusional.
Intention: youth