 Clarke had not forgotten his previous pet scheme: the Commandos. In January 1941, he met the American Colonel William J. Donovan while the latter was touring the region. Clarke's description of the 1940 British unit inspired Donovan to emulate the idea. Clarke suggested the name "Rangers", after the frontier force Rogers' Rangers in the film Northwest Passage, for Donovan's unit. In May of the following year the United States Army Rangers were founded.
