Callisto Incident

This article does not have enough inline citations and/or does not adhere to the proper citation format. You can help Halopedia by adding citations.

This article does not meet the wiki's general standards and/or standards on layouts. You can help by cleaning this article.

This article is a stub. You can help Halopedia by expanding it.

The Callisto Incident is what effectively began the war between the United Nations Space Command and the Insurrectionists.