Fractures

A Fracture, also known as Fractures, is a piece of Halo fiction considered part of a different "branch" of Halo lore to the normal Halo universe.

Tenrai
The Tenrai Fracture is an alternate timeline where the Japanese shogunate united humanity under their banner, rather than the United Nations. When the shogunate encountered the Covenant, they initially had no adequate defenses and were on the verge of defeat. During a pivotal battle, a "strange samurai" emerged from an anomaly and turned the tide of the war. The shogunate reverse-engineered this hero's armor, creating the Yoroi armor core for their samurai warriors. With the help of its old enemy, the Imperial Court, the shogunate went on to attain victory over the Covenant, whose surviving forces were reduced to marauding raiders.

Belos
This Fracture branch has Belos armor in it.

Blackguard
This Fracture branch has Blackguard armor in it.

Drengr
This Fracture branch has Drengr armor in it.

Production notes
Fracture are used as events in Halo Infinite and Halo: The Master Chief Collection to explain why certain armor exists. Such as Yoroi, and specific Season 8: Mythic items in their relevant games.