gang up (verb)

1. In the American Revolutionary War, the thirteen colonies ganged up against the British empire to fight for their independence.

2. During the Renaissance, a group of artists ganged up to challenge the traditional artistic style and create a new movement.

3. In Greek mythology, the gods would often gang up to defend or attack different groups of mortals or other gods.

4. In the cartoon series, the superheroes gang up to defeat the supervillain and save the city from destruction.