The Battle of Vác, fought on 10 April 1849, was one of two important battles which took place in Vác during the Spring Campaign of the Hungarian War of Independence between the Austrian Empire and the Hungarian revolutionary army. The battle was the starting point of the second phase of the Spring Campaign, during which the Hungarians planned to relieve the fortress of Komárom from an Austrian siege, and to encircle the Austrian forces headquartered in the Hungarian capitals of Buda and Pest.