The Battle of Jelgava was an operation of the Latvian Army from 15 to 21 November 1919 during the Latvian War of Independence against the Western Russian Volunteer army. Throughout the summer and autumn months the city of Jelgava was the headquarters of the paramilitary German-Russian forces under Colonel Prince Bermondt-Avalov. After the Bermondtian Affair, where German paramilitary forces laid siege to Riga until November 10, 1919, the Latvian Army conducted an offensive to force the units of the Western Russian Volunteer army subordinated to the Weimar Republic to leave Jelgava.