1631 – English colony of Massachusetts Bay granted Puritans voting rights and John Winthrop was elected 1st governor of Massachusetts.
1652 – Rhode Island passes the first law in English-speaking North America making slavery illegal.
1775 – Benedict Arnold captures British sloop and renames her Enterprise, first of many famous ships with that name.
https://thisdayinusmilhist.wordpress.com/2014/05/18/may-18/