Jonestown massacre: Jonestown massacre, the mass murder-suicide of members of the Peoples Temple cult in Guyana in 1978 at the behest of leader Jim Jones.
Your cover letter shouldn't be longer than one page. It should highlight your most relevant qualifications for the job and what you have to offer the employer. In fact, as far as how long your cover letter should be, shorter is better.
The cover letter is a brief introduction, not your entire history so don't try to cover everything. Just make sure that these 4 points are addressed. You should customize and tweak your letter for every single position, highlighting the skills and experiences that are most important to your target employers.