Dwarves

Dwarves are a type of enemy in the borderlands 2 DLC Tiny Tina's assult on Dragon Keep.

Meet the dwarves
When you first meet the dwarves they are initially friendly until you kill their king in the quest Dwarven Allies. This turns all the dwarves in the mine hostile.

Trivia

 * Dwarves are actually all modified versions of salvador as is noted by lilith in the quest dwarven allies.