An ambitious and reckless cavalry officer who assumes command of the fort. Driven by a desire for glory, he ignores tactical advice and launches a disastrous attack that results in heavy casualties.
Married couple with marital tension
Major conflict throughout the film over strategy and command
Marston asserts authority over Riordan despite being in temporary command
Clarke has a familiar relationship with Marston but disagrees with his strategy
Explore the full interactive character relationship map of The Last Frontier