In 1534, the Danish Count's Feud spilled over into the Low Countries where the Guelders Wars were raging, when Habsburg supported Enno II, Count of East Frisia, ally of Christopher of Oldenburg and Charles, Duke of Guelders, supported Balthasar Oomkens von Esens, ally of Christian III of Denmark.
He threatened to invade Holland if the Habsburg Netherlands would gather a fleet in support of Christopher of Oldenburg to lift the siege of Copenhagen.
Mary of Hungary nevertheless ordered Adolf of Burgundy to compose a fleet of 45 Dutch, Spanish, and Portuguese ships with 3,000 sailors and 4,500 troops under command of Frederick II, Elector Palatine.
She also sent Georg Schenck van Toutenburg with the soldiers to Groningen to eliminate the threat of the enemy troops there.
Before the Dutch fleet was ready to sail, Copenhagen fell in the hands of Christian III of Denmark, and peace was concluded in the Count's Feud.