Why did Louis IV make a secret agreement with the Habsburgs in 1331?

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Louis IV entered into a secret covenant with the Habsburgs on May 31, 1331, primarily as a strategic response to the actions of John of Bohemia.1

In 1330, John of Bohemia had arranged for his younger son, John Henry, to marry the heiress of Carinthia-Tirol. This move threatened Louis's interests and influence. By establishing a secret agreement with the Habsburgs regarding the partition of this strategically important inheritance, Louis aimed to encircle John of Bohemia and force his withdrawal from Italy, where John had been acting as an imperial vicar.1