The Bizarre Adventures of Woodruff and the Schnibble

After a devastating atomic war, the world population was nearly annihilated, and the survivors had to hide deep underground. In the meantime, a peaceful race of human-like creatures, the boozooks, populated the Earth. After the humans ascended to the surface again, they started a bloody war against this race. The boozooks were mercilessly destroyed, their culture demolished, and in the end of the war they were enslaved by humans.