On this day 250 years ago in London Parliament passed the Boston Port Act. This bill closing the Port of Boston to commerce was the first of the Intolerable Acts. These bills were intended to coerce the American colonies into submitting to rule from London but had the opposite of effect of uniting all thirteen colonies in opposition to British rule and eventually led to Independence.

Source: https://www.americanhistorycentral.com/entries/boston-port-act-facts/