Andreas Baumkircher used the medieval legal instrument of the feud to get from Emperor Friedrich III. to claim outstanding amounts of money of several 10,000 guilders. The feud letter was on February 1, 1469 to the Styrian governor Ulrich III. sent from Graben as the emperor's deputy; however, instead of waiting for the three days prescribed for feuds, numerous Styrian cities were occupied the next day in order to isolate the imperial possessions in western Hungary.
The first military contact was on July 21, 1469 with the Battle of Fürstenfeld , which brought heavy losses on both sides and ended with an armistice, but further battles followed.
In October 1469 an armistice was signed between Friedrich III. and Baumkircher agreed. On June 30, 1470, Friedrich III. a contract with Baumkircher, which promised him complete amnesty and a payment of 14,000 florins . In the fall of 1470, Baumkircher rose again against Emperor Friedrich III for failure to make payments.
On April 23, 1471 Baumkircher and Andreas von Greisenegg went to Graz for negotiations after they had been promised safe conduct . However, both were arrested and publicly beheaded in front of the Murtor that evening without a trial .
- Roland Schäffer: The Baumkircherfehde (1469-1471). In: Andreas Baumkircher and his time. Symposium as part of the "Schlaininger Talks" from 24.-26. September 1982 at Schlaining Castle. (= Scientific papers from Burgenland . Issue 67). Burgenland State Museum, Eisenstadt 1983, ISBN 3-85405-085-2 , pp. 151-182, PDF on ZOBODAT