The Krakovian War, also known as the Russian War, was a European War that started in 1850 and concluded in 1852, fought over Eastern-European tensions. The war ended the period of Russian hegemony that had existed for over 35 years, and confirmed the Danubian Federation as a permanent power in the region. Three of the five great powers were involved in the military conflict, making it the largest European conflict since 1815, finally concluding in 1852 with a Prusso-Danubian victory.