The battle is also mentioned in the Anglo-Saxon Chronicle.

The battle is also mentioned in the book Unintended Consequences.

This was the first time that "deep battle" was mentioned in official Red Army literature.

The entire battle takes place off panel and is only mentioned in conjunction with attacks upon other superhero teams.

The battle is mentioned in a number of contemporary chronicles.

There has been no physical evidence of a battle uncovered on the supposed battlefield, nor is the battle mentioned in any document from that time.

In addition one other battle is mentioned taking place before the book begins:

At (9:20) his final battle against the Pandavas is mentioned.

Immigrations, visas and the battle against organized crime and drugs were mentioned as specific areas that a central government might absorb.

The battle was mentioned by Bede although the exact location of the battle is not known.