The Resistance is a group of individuals fighting the Observer regime in 2036. Their ultimate goal is to get rid of the Observers and regain control of Earth.
The Resistance is headquartered in Bronx, New York. They have access to security cameras, as well as Fringe Division through contacts like Etta and Simon. The Resistance was responsible from removing the original Fringe Division from amber, who joined their ranks immediately to fight the invaders. They began to implement Walter's Plan.
Crippling blows were dealt to the Resistance through the deaths of Simon and Etta. However, they fought on to try and prevent shipments from the future, although they were unsuccessful.