Year 1770 (MDCCLXX) was a common year starting on Monday (see link for calendar) of the Gregorian calendar (or a common year starting on Friday of the 11-day-slower Julian calendar). Events of 1770 January - June March 5 - Boston Massacre: 5 Americans trampled by British troops in an event that would help start the American Revolutionary War 5 years later. April 19 - British explorer, Captain James Cook, and his crew aboard the Endeavour become the first recorded Europeans to encounter the… (More on 1770)