Board Thread:Warhammer 40k General Discussion/@comment-7499389-20130407223055/@comment-4582688-20130408034044

During the Imperial invasion of the planet Learan during the Great Crusade, the Emperor's Children had entire companies fighting the Lear underwater, on the ocean's floor. This is from the Horus Heresy Novel Fulgrim, and the characters in the book act like its no big deal and had been done many times before. It doesn't mention if they wore any special kinds of Power Armour though.