Some of clay figures discoverd in the ruins of South America assumed dinosaurs on which mankind ride.

From this, some were of the option that mankind and dinosaurs lived together.

A battlefield existed there...

That was the world controlled by Amazones.... In this place, the man of the other tribes strived for the queen once of a year...

At that time, a man who proved that his dinosaur was stronger than the other men was able to obtain the queen.

And a year of being the world master was reserved for him. The king was called... “Dino Rex”!

(Spelling and grammar mistakes from the original intro.)