...seriously, a simple Google would have worked.
Quote:Origins
The Magical Congress of the United States of America, known to American witches and wizards by the abbreviation MACUSA (commonly pronounced as: Mah – cooz – ah) was created in 1693, following the introduction of the International Statute of Wizarding Secrecy. Wizards worldwide had reached a tipping point, suspecting that they could lead freer and happier lives if they built an underground community that offered its own support and had its own structures. This feeling was particularly strong in America, due to the recent Salem Witch Trials
