 They would spray it about on the opposite bank that represented the enemy camp.The flames would ignite into a sheet of flame, destroying the wooden fortifications, and even killing the water plants, fishes and turtles.In 1126 AD, Li Gang used flamethrowers in an attempt to prevent the Jurchens from crossing the Yellow River.Illustrations and descriptions of mobile flamethrowers on four-wheel push carts were documented in the "Wujing Zongyao", written in 1044 AD (its illustration redrawn in 1601 as well).