Sigismund IV of Poland

Sigismund IV (Zygmunt IV, Žygimantas IV, English exonym: Sigmund; 3 September 1856 – 22 March 1942), sometimes called Sigismund the Mad, was last King of Poland and Holy Polish Emperor form 1887 to his death, until Republic declared after his death. After Casimir V's death, he lost First Polish Empire territory under the reign of his greatuncle Charles I. Since the reign of Charles I, he was titled "Holy Polish Emperor".

Less then 4 months into Sigismund's reign, he always wants war with Austria, (which Charles I make peace and become alies with good friend Francis II) that Austrian does not liked the "new" Polish Emperor. Sigismund declared war agianist Austria on April 1887.