C745 Raging flames burning city

Fierce Fire Oil was oil that came from the Western Regions. In this era, it had almost no other uses other than burning oil, so very few people knew about it.

However, there are historical records that during the Northern Song Dynasty, there were people who used oil to wage war.

No matter how hard it was to carry, it was better than animal fat if it didn't burn too much.

Dig a ditch