"8ea" is an abbreviation, and the English name is "8th Edition Armybook". This word is usually used to describe the legion rule book in sandbox war games. This book provides the history, lineup, tactics and rules of a legion, so that players can better understand and use the legion in actual combat.

Besides sandbox war games, the abbreviation 8ea has other uses. For example, the words "8ea Version" may appear in some software interfaces, indicating the version number of the current software. At the same time, in some computer development fields, 8ea is often used to represent an "eight-bit unsigned integer", similar to a "byte" in a computer.

On the Internet and social media, 8ea has also become the slogan or logo of some groups or groups. For example, in some forums or game communities, some teams or game groups will use 8ea as their names or Logo. In addition, 8ea is also used to express some opinions or emotions, such as "8ea is a belief", which can express a person's pursuit and persistence in a certain thing, state or goal.