Garchuk Lachit Garh (meaning 'fort' in Assamese) or Fort, now popularly known as Lachit Garh, is located in the South Western part of the Guwahati city to the west of Ahomgaon. The fort was constructed under the Ahom kingdom during the times of Lachit Borphukan around the year 1670 CE to deter the Mughal cavalry with two earthen ramparts and two water filled lakes in between and ditches dug in front, which can be seen by visitors.

Lachit Borphukan was a commander and Borphukan in the Ahom kingdom, located in present-day Assam, India, known for his leadership in the 1671 Battle of Saraighat that thwarted a drawn-out attempt by Mughal forces under the command of Ramsingh I to take back Ahom kingdom. He died about a year later due to illness.