The Argonian resistance to the Daedric Invasion of Tamriel occurred at some point in 3E 433, after the Battle of Kvatch and the beginning of the Crisis. Oblivion Gates opened in all provinces of the Empire, including Black Marsh, where the Imperial presence was already faltering. Despite claims by High Chancellor Ocato that the Imperial Legion was fully committed to fighting the war in the provinces, at least one garrison — Fort Swampmoth — was known to have been abandoned. Most settlers and non-Argonians were leaving Black Marsh at this time; the Argonians themselves were mostly left to their own devices when the Daedra attacked.