From Longman Dictionary of Contemporary Englishsally forth phrasal verb literaryLEAVE A PLACEto go out in order to do something, especially something that you expect to be difficult or dangerous – often used humorously Each morning they sallied forth in search of jobs. → sally→ See Verb table
Examples from the Corpus
sally forth• Their mountainous homeland with its fortress valleys was a near impregnable base from which to sally forth.• But Tommy was so good natured about everything and he would sally forth and start asking people where his strays might be.• We need, therefore, to sally forth once more into the mathematical jungle of vector spaces.• Thursday morning: himself, myself and large black labrador sally forth to G-o-S. 