The Order of the Phoenix

The Order of the Phoenix was a secret society founded by Albus Dumbledore to oppose Lord Voldemort and his Death Eaters. The original Order was created in the 70's 20th century. It was constructed after Voldemort returned to England from abroad and started his campaign to take over the Ministry of Magic and persecute Muggle-borns. The Order worked with the Ministry to oppose the Dark Lord and his followers, and played a crucial role in the First Wizarding War. Victory came in 1981, with Voldemort retreating to, at the time, places unknown. Victory came with the high cost of many of their members.

The Order disbanded, but was reconvened in 1995 following The Attack on Hogwarts. It was through the combined efforts of the Order that victory was achieved twice more, eventually resulting in the permanent death of the Dark Lord.