UNSC Defense Force (Reconciliation)

The United Nations Space Command Defense Force (abbreviated as UNSCDF), colloquially referred to as the UNSC Defense Force or simply the Defense Force, is the intercolonial security and military arm of the United Nations Space Command, which itself—in addition to tasks for which the Defense Force is responsible—conducts the many exploratory, scientific, and interstellar operations of the Unified Earth Government. The UNSC Defense Force was created during the 2160s, alongside the UNSC, by the United Nations and its member-states to better combat the secessionist Frieden and Koslovic movements as well as other belligerent countries. It quickly supplanted the various national armed forces which served the United Nations and grew into an organized, uniform fighting force.

Branches
The UNSC Defense Force is composed of a handful of major branches—the Army, Navy, Air Force, Marine Corps, Colonial Guard, and Spartan. The former four have been operational continuously since the. Spartan was organized to house active members of the UNSC's various SPARTAN programs, while the Colonial Guard was formed to replace the Colonial Militia, which was disbanded and its resources allocated elsewhere in the opening period of the.