I'm not sure if there are any exact dates available, but does anyone know around what year the First War began, and any other important milestones in the war? Around what year did Voldemort first start gathering followers? When did the Ministry take notice? Around what time was the Order formed? Any estimations on these dates would be great.

Also, relating to the above, when did Voldemort come to Hogwarts and ask for the DADA job (Dumbledore's memory in HBP)? I assume this was before the war really began, or Voldemort wouldn't have been allowed near Hogwarts, but that means that there were around twenty years, if not more, during which the DADA job was cursed... which is a long time and a lot of teachers!

Any insight would be helpul! Thank you!