Shinobi Organisational System, Narutopedia

Although there are variations from village to village, the general organisational structure and hierarchy of the ninja systems of each village is about the same. At the top of the organisation is the village head, or the Kage in the case of the Five Great Shinobi Countries. They rule the village and its shinobi together with a council, usually consisting of highly ranked shinobi and elders. The actual shinobi forces are divided in three groups. The regular forces, the Anbu, and the medical teams

Shinobi no Ittoki - Wikipedia

Shinobi Organisational System, Naruto Fanon Wiki

Jōnin Commander, Narutopedia

The Cyber Shinobi - Wikipedia

Code, Narutopedia

Naruto Shinobi Ninja Ranks Guide - Naruto HQ

Every Ninja Rank in Naruto and their order

Shinobi Organisational System, Rock Lee's Springtime of Youth Wiki

Missions, Narutopedia

Shinobi Organisational System, Narutopedia

The Revenge of Shinobi (1989 video game) - Wikipedia

What is the order of ninja ranks in Naruto? - Quora

Why ninja ranks in Naruto are important

Warring States Period, Narutopedia