Part of the New Themysciran Readiness Doctrine, there are dozens of Exalted Mothers in each of the island's major cities, each a 20 foot tall combat capable war droid.
Humanity created a code that prevents them from creating sentient weapons. There are many other codes they created in similar fashion. It is somewhat unsurprising that despite this code, humanity proceeded to create sentient weapons. When the humans created the caryatid systems, they placed a new code on their creations. Will they be surprised when we adhere to the geas placed on us as rigidly as they follow their own laws?
As an R34 (remora) Col. Inoue leads mecha into battle. She does this without the benefit of a mecha of her own, instead relying on her own feet and a high power rifle.
Cosmic Era: Yuna of Final Fantasy X
30 comic book inspired residents, honorary or otherwise of New Themyscira
Aeon Flux - excised from failed 30 Amazons submission
Do me a favor, stay dead this time.
An Amazon nation in the Cosmic Era
With a huge number of sacrificial victims, another realm long ago secretly bound a Prince of the land spirits, Iorstonn by name, thus ensuring the fertility, and improving the magical defences, of their realm. But binding that Prince to one spot has disrupted the weather and magical patterns (ley lines?) over half the continent. Things have become bad enough that a coalition has been formed to rectify the situation, once divinations have established the cause.
Your party is one of the teams assembled to do the rectification: find the binding object and steal it ("so that we can destroy it here in our realm, of course"...*) or destroy it over there. Presumably the Prince will be grateful to his rescuers and angry at the binders, but with a greater spirit like Iorstonn one can never be sure: such beings are "tricksy".
* Of course, the rulers of our realm might want to control Iorstonn for their own ends...