The Fremen are a group of people in the fictional Dune universe created by Frank Herbert. First appearing in the 1965 novel Dune, the Fremen inhabit the desert planet Arrakis (also known as Dune), which is the sole known source in the universe of the all-important spice melange. Long overlooked by the rest of the Imperium and considered backward savages, in reality they are an extremely hardy people and exist in large numbers. As humans in extremis, over time they adapted their culture and way of life to survive and thrive in the incredibly harsh conditions of Arrakis. The Fremen are distinguished by their fierce fighting abilities and adeptness at survival in these conditions. With water being such a rare commodity on the planet, their culture revolves around its preservation and conservation.
Arrakis … Dune … wasteland of the Empire, and the most valuable planet in the universe. Because it is here—and only here—where spice is found. The spice. Without it there is no commerce in the Empire, there is no civilization. Arrakis … Dune … home of the spice, greatest of treasure in the universe. And he who controls it, controls our destiny