Answer:
A Pequot fort at Mystic.
Step-by-step explanation:
The Pequot War was a conflict that occurred between the English colonies and the Pequot tribe. The war occurred 1636-1638.
The site of the most serious conflict of the Pequot War was the Pequot Fort at Msytic. The conflict happened at Mystic is also called the Mystic Massacre or the Pequot massacre.
The battle took place on May 26, 1637. The war near Mystic started when Connecticut colonies with its allies, Narragansett and Mohegan, fired on the Pequot Fort near the Mystic River.
Therefore, correct answer is a Pequot Fort at Mystic.