Slayer Timeline

Prehistory

Shadow Men who later on became the Watchers Council Summoned the First Slayer to fight monsters for them

ca 800 AD

The Cruciamentum is announced a trial for the Slayer which is done on her 18th Birthday. In the weeks prior to the Slayer's 18th birthday, the Watcher is forced to administer the Slayer with a number of chemicals to weaken her powers, leaving her with the strength and reflexes of a regular teenage girl. Then she's taken to a specially prepared location where she's locked with a particularly vicious vampire selected by the Council for its potential to actually killing the Slayer

1900

Spike kills a Slayer in China during the Boxer Rebellion. The Slayer was known as Ming Liu

1977

Spike kills a second Slayer in New York. Who we later find out to be Robin Woods Mum, Nikki Wood who is the only slayer known to of had a child

1996

Buffy is called up as Slayer whilst in Los Angeles. Her first fight gets her kicked out of her school being the reason they move to Sunnydale. Also Angel is summoned by The Powers That Be to help the Slayer.

1997

Buffy moves to Sunnydale not knowing it is on top of the Hellmouth. Angel moves to Sunnydale aswell hoping to to help her out there and Rupert Giles who becomes Buffy's second Watcher becomes the school Librarian. Spike arrives in Sunnydale hoping to cause havoc and due to Buffy being dead for a matter of seconds after her battle with the Master makes Kendra become called up even though Buffy is not dead due to Xander bringing her back with CPR.

1998

Kendra is killed by Drussila which calls upon Faith as the new Slayer with Buffy still being alive. Buffy also kills Angel to save the world and leaves Sunnydale for a while and then returning to make sure vampires stay in the ground.

1999

Buffy goes through The Cruciamentum and passes however Giles is fired as her watcher due to the council believing he has become to close to carry on. Wesley arrives in town becoming Buffy's new Watcher and Faith accidently kills a human. Buffy defeats the Mayor and puts Faith into a coma.

2000

Faith awakes from her coma to only switch bodies with Buffy