go-it-alone (adj.) Look up go-it-alone at Dictionary.com
attested by 1953 (in reference to U.S. foreign policy proposals), from an American English verbal phrase attested by 1842 and meaning "do anything without assistance." Go it as colloquial for "to act" (especially in a determined or vigorous way) is from 1825; hence also go it blind (1848) "without regard for consequences."