As the Soldiers walked under the trees at night, there would be gun shots coming out of them.

Then one 20 year old man, in the UK found a text that was a war in the dark ages against some dog-like-bat people ruling humans, and building a empire.
And then they were having a war with them, and their only weakness is their own invention, laser-fire.
The way to make laser-fire is to get a fire going, and then getting a giant catapult, then a laser gun put it into the fire and then carefully put it into the catapult, then let it rip.

This young man went to Australia and gave the book to the Army, the Army used this on the Bush Aliens and killed them all.

OR DID THEY.