The Austro-Polish War or Polish-Austrian War was a part of the War of the Fifth Coalition in 1809. In this war, Polish forces of the Napoleon-allied Duchy of Warsaw and assisted by forces of the Kingdom of Saxony, fought against the Austrian Empire. In June, the Russian Empire joined against Austria. Polish troops withstood the Austrian attack on Warsaw defeating them at Raszyn, then abandoned Warsaw in order to reconquer parts of pre-partition Poland including Kraków and Lwów, forcing the Austrians to abandon Warsaw in futile pursuit.

The first Battle of Raszyn was fought on 19 April 1809 between armies of the Austrian Empire under Archduke Ferdinand Karl Joseph of Austria-Este and the Duchy of Warsaw under Józef Antoni Poniatowski, as part of the War of the Fifth Coalition in the Napoleonic Wars. The battle was not decisive, but it did result in the Austrians obtaining their goal by capturing the Polish capital Warsaw.