It was hard to say which of the two held more power. Kel'Thuzad and Lady Deathwhisper had different responsibilities: one handled external affairs, the other internal affairs. Kel'Thuzad commanded the Lich the Council and the Resurrection Hall, while Lady Deathwhisper controlled the Shadow Envoy forces and the Hand of Death. Both wanted to advance further and take charge of the Dark Cathedral.
Their infighting, however, gave the Death Knights an opportunity. The Death Knights had always been under the Lich King's direct control. Though their rank was high, their authority was not necessarily substantial. Much of the time, their primary duty was merely to serve as the Lich King's enforcers, with little real power in their hands.
Even the San'layn the Council, which had recently "joined" the Scourge, held considerable actual power. Blood Queen Lana'thel, in particular, was one of the Lich King's core subordinates and oversaw the other forces.
The Death Knights were deeply envious of this. No one wanted to spend their entire life as an enforcer. Even after death, they wanted to keep improving their standing and strength. Most of those who voluntarily joined the Scourge were ordinary people dissatisfied with their lives or worn down by suffering, or members of the lower classes oppressed by unreasonable nobles. They joined the Scourge only to change their circumstances, or rather, to gain an opportunity to climb higher.
To them, life could not get any worse. What was wrong with joining the Scourge?
On the Coalition Forces' side.
After days of fighting, the entire Broken Plains had been cleared. All the main forces of the Northern Expeditionary Force had turned out in full: the High Elves, the Knights of the Ebon Blade, the Silver Hand, the Aerie Peak Dwarves, the humans of Stromgarde, the Valiance Expedition, and the