The 1830s and 1840s saw romantic nationalism inspire the Croatian National Revival, a political and cultural campaign advocating the unity of all South Slavs in the empire. Its primary focus was establishing a standard language as a counterweight to Hungarian while promoting Croatian literature and culture. During the Hungarian Revolution of 1848, Croatia sided with the Austrians, Ban Josip Jelačić helping defeat the Hungarian forces in 1849 and ushering a Germanization policy.