The knight was tall, with wide shoulders and a sweeping mustache, proudly wearing a suit of heavy plate mail. The Stormwind insignia was emblazoned across both the breastplate of his armor and the crest of his helm, and a series of smaller engravings indicates that he was a high-ranking officer in the human army. His stance was that of a battle-hardened veteran, wary but still at ease, as if he was absolutely confident in his ability to deal with any danger that comes his way. General Marcus Jonathan was absolutely fearless in battle, completely willing to lay down his life in the defense of his country. He always strode boldly into combat, attempting to identify and then work his way toward the leader of the enemy forces. He preferred to move steadily into the middle of the enemy force, surrounding himself with enemies in order to maximize the benefit of his cleaving attack and to gain a moderate amount of cover from enemy archers.[1]
Marcus visited Dalaran at least once while still a private, as evidenced by [a coin] from the Dalaran fountain. He seems to have more than gotten his wish "to grow a glorious, bushy mustache someday."
In Cataclysm
This section concerns content exclusive to Cataclysm.
In Cataclysm, General Marcus Jonathan aids in the arrest of Hogger in Elwynn Forest, and transports him to the Stormwind Stockades with the help of High Sorcerer Andromath.
In Mists of Pandaria, General Marcus Jonathan was killed at the Battle for Theramore, he was replaced by General Hammond Clay <High Commander of Stormwind Defense>.