When Dieter IV sold Marienburg its independence for massive "donations" to the imperial coffers, Wilhelm was quickly elected Emperor. One of the first things he did was to issue an edict separating Talabecland and Talabheim. Dieter became Grand Duke of Talabecland, while the old Duke, Frederik, retained control of Talabheim. Next, Wilhelm attempted to retake Marienburg by force. He was defeated at the Battle of Grootscher Marsh and had no choice but to recognize Marienburg as an independent state.
Around the same time, a trio of illusionists made off with much of the Emperor's treasure. In response, Wilhelm ordered a mass trial of wizards on charges of witchcraft and Chaos worshipping. Later in his reign, Wilhelm devoted more time and resources to roads, communication, and infrastructure. In 2453 IC, he established a system of imperial messengers.
When he went to war, he was famous for his superior pikemen and heavy cavalry. It is unknown when Wilhelm died, but he was succeeded by his son. His family retains control of the Empire to this day; Karl Franz is his direct descendant.
- Warhammer Armies: The Empire (8th Edition) p. 21
- Warhammer Rulebook (8th Edition) p.172
- The Enemy Within p. 12,23
- Sigmar's Heirs p.18,22
- Marienburg: Sold Down the River p.21