Who is Major Dennis Michaelson from Subterranean and what is their importance? Subterranean_(James_Rollins) English & Literature Major Dennis Michaelson | Subterranean

Major Dennis Michaelson is the leader of the Navy Seal team that accompanies the expedition team into the caverns. Michaelson's little brother was with the first expedition that disappeared. He assists Ashley and Ben as they foray deeper into the cave system and stands by Ashley when she is blamed for the murder of Mo'amba.