Grandline Shinsekai: Episode 16

Extremists is the sixteenth episode of Grandline Shinsekai.

Plot
The Red Wing Pirates travel to the deserted town of Yuba in order to get oil to fuel the tank. They travel around Yuba until they locate an oil factory that has been taken over and ransacked by a group of masked men. The group tries to negotiate taking some of the oil, since they were just going to steal it anyway until a factory worker arrives and reveals the masked men are extremists who've threatened the town into a state of emergency.

Enraged, Entei and the others attack the extremists, who detonate the oil to cover their escape. The factory worker thanks the Red Wing Pirates for their help, in saving the people of Yuba. He gives them a spare oil drum, and the Red Wing Pirates leave to fuel their tank and head towards the summit.