Topic summary
Death Eaters

Extracted from the Wikipedia article Death Eater.
Re-emergence
The Minister for Magic, Cornelius Fudge, deludes himself into believing that Voldemort could not have come back and that it was all a lie cooked up by Dumbledore, who Fudge believes had designs on his political office. The Death Eaters use this tactical advantage throughout Harry Potter and the Order of the Phoenix to maintain their secrecy. Because of the Ministry's refusal to remove the Dementors from Azkaban (as Dumbledore advises immediately following Voldemort's return), the Death Eaters recruit the Dementors to their cause and make similar progress with the giants; the Dementors' revolt against the Ministry of Magic also allows the Death Eaters to bolster their ranks with the mass break-out of several imprisoned Death Eaters, including Bellatrix Lestrange.