I found this passage from "The Gurkhas," by Byron Farwell, to be especially interesting in that it gives a good example of the fighting ability of the Gorkhas.
"Everywhere, out of the night, the little hillmen raced in upon the defenders for the hand-to-hand fighting in which they have no peers. Again and again a single Gurkha leapt into a group of Germans and destroyed them.
"One Gurkha officer killed six Germans, another officer killed five in clearing farmhouses. Two German tanks, moving up in close support, were pounced upon, their crews slaughtered, and the tanks captured intact."
"Everywhere, out of the night, the little hillmen raced in upon the defenders for the hand-to-hand fighting in which they have no peers. Again and again a single Gurkha leapt into a group of Germans and destroyed them.
"One Gurkha officer killed six Germans, another officer killed five in clearing farmhouses. Two German tanks, moving up in close support, were pounced upon, their crews slaughtered, and the tanks captured intact."