Murdock is the humble military commander of Bern, leader of the Three Dragon Generals, and second only to Zephiel in the Army of Bern, a notable feat considering he came from a peasant family.
When King Desmond poisoned Zephiel, Murdock was the one who nursed him back to health. He is Zephiel's most trusted subordinate and has been appointed the leader of the three Dragon Generals. During the time Narcian was a Dragon General, Galle served as Murdock's lieutenant. Later, after Narcian is slain and is replaced by Galle, Pereth, a Bern General, serves as Murdock's lieutenant.
He has a brief cameo in the prequel, Fire Emblem: The Blazing Blade, rebuking a soldier questioning King Desmond's actions and claiming something must be done about the tyrant. He later gives the player a Warp staff as thanks for saving Zephiel's life.