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
In cases where a person has accused another of a crime, but there are no other supporters of the accusation or defenders of the accused, and there is not enough evidence to support one party or the other, the two people involved, or their champions in some cases, must duel in the presence of the local ruler or leader. The loser is assumed to be lying and punished accordingly.