Political map of Europe & the Mediterranean 24 July 1848 (First Battle of Custoza): By July, the Austrian forces in Italy (First Italian War of Independence) had retaken most of Venetia (Kingdom of Lombardy%E2%80%93Venetia) and were ready to launch an all-out attack on the Sardinian lines. At the Battle of Custoza (Battle of Custoza (1848)), the Austrians broke through, forcing the Sardinians to retreat to Milan. Unwilling to continue the fight, Sardinia agreed to an armistice and promptly withdrew from Lombardy.