What events saved Vienna from mongol invasion?

Just as the Mongols were preparing for their invasion of Europe in December 1241, Ögedei Khan, the Great Khan of the Mongol Empire, suddenly died. This event caused a succession crisis within the Mongol Empire and led to a temporary halt in their westward expansion.

2. Batu's Retreat from Hungary:

Batu Khan, the grandson of Genghis Khan and leader of the Mongol army in Europe, had defeated the Hungarian army at the Battle of Mohi in April 1241. However, he decided to retreat from Hungary in 1242 for several reasons:

- Internal Conflicts within the Mongol Empire: The death of Ögedei Khan and the ensuing power struggle within the Mongol Empire may have contributed to Batu's decision to withdraw from Europe.

- Logistical Challenges: Maintaining supply lines for the Mongol army over long distances was a significant logistical challenge.

The distance between the Mongol heartland and Europe made it difficult for Batu to sustain his forces in Hungary.

- Resistance from European Forces: The Mongols encountered fierce resistance from European armies, including the Hungarians, Poles, and Germans. These battles took a toll on the Mongol forces, and Batu may have realized the difficulties in conquering all of Europe.

3. The Council of Lyon:

Pope Innocent IV convened the Council of Lyon in 1245, partly in response to the Mongol threat. This council aimed to unite European leaders and mobilize resources for a potential defense against the Mongols. The increased awareness and preparation among European forces might have deterred the Mongols from further incursions.

4. Mongol Focus on the Middle East:

With the death of Ögedei Khan, Batu turned his attention to the Middle East, where he campaigned against the Abbasid Caliphate. The Mongols achieved significant successes in the Middle East, and their focus shifted away from Europe.