The undeclared war between Guinea, Sierra Leone and Liberia, fought in the area where there three borders meet, involves more than three nations. Mercenaries from Ukraine, South Africa, Ethiopia, France and Libya provide pilots, technicians and other specialists to keep warplanes, especially helicopters, operating. The helicopters are particularly popular as they can be used to move diamonds, found in the region being fought over, quickly to a safer place where they can be exchanged for cash to pay the mercenaries.