Well, for once this is a weapon the Amazons don't have.
Romans, on the other hand, can deploy minefield at relatively low level of cultural development.
there are three types currently under development, and a 4th one been researched on.
1.caltrop/Tribulus barrier
2.boobytrap barrier
3.incendiary mine
These are what the modern military refer to as Area Denial Weapon. Minefield is the easiest way to describe it, so the name stuck.
The 4th one is still under R&D, which would be an artillery launched Area Denial Weapon. this would be similar to United States M692/M731 155mm projectile munition which carry M67 or M72 land mines.
Except in Amazon Total War, they would be launched from an Onager or a Ballista, and the munition would be nothing more than a small bucket of metal tetrahedral spikes (aka Caltrop).











