A few years ago I read a novel about Alexander the Great. It was an alternative history novel. Aristotle, who really was Alexander’s mentor, in this book invented all kinds of ahead-of-its-time weaponry. I particularly remember submarines and depth charges.
I thought that was pretty silly. But there actually were wild and surprising ancient weapons. I link to this article on four weapons to make you rethink ancient warfare.
Ancient warfare was nasty. The opening scene of Gladiators shows the Roman army decimating a barbarian force with fire. “Unleash hell”, says the commander. That scene may be exaggerated, but it gives vivid context to the “flaming arrows” of the evil one in Ephesians 6:16.