[@RC3][@Barioth]
Thanks guys for the interest.

Here are the ranks:

Genin for the better word are noobs. Their purpose is to grow.

Chunin are experienced Ninja who are tasked on field work. The second in command when the Jonin are not present. They are skilled shinobi that can take on multiple opponents at once. 

Jonin is basically mission control, team leaders. They are often professors of Academy. Their purpose is to lead missions and groom Genin.

ANBU are merely Hokage's Taskmasters that exceed Jonin, they deal with top secret missions. Their relevance in a time of decline has increased, missions involve supervising bodyguard missions etc. Direct orders from the Kage.