When writing the name of a battle in report do you underline it?

No, you don't underline the name of a battle in a report. There are a few different ways to format battle names:

* Italics: This is the most common and preferred style for most publications. For example: *Battle of Gettysburg*

* Quotation marks: This is less common but acceptable, especially for shorter battles. For example: "Battle of Antietam"

* No formatting: Some publications simply use plain text for battle names. For example: Battle of Hastings

Ultimately, the best way to format battle names depends on the specific style guide you are following.