Douglas Harper's Etymology Dictionary
also frog's march, 1871, a term that originated among London police and referred to their method of moving "a drunken or refractory prisoner" by carrying him face-down between four people, each holding a limb; the connection with frog (n.1) perhaps being the notion of going along belly-down. By the 1930s, the verb was used in reference to the much more efficient (but less frog-like) method of getting someone in an arm-behind-the-back hold and hustling him or her along. As a verb by 1884.
Wiktionary
n. (alternative spelling of frog march English)
Usage examples of "frog-march".
It was an odd little parade that descended four flights of stairs and walked a hundred yards down a subterranean corridor that could have been pre-Romanthe hunched dwarf Dungy limping along in the lead, carrying a flaring torch over his head, followed by the two men who frog-marched between them the chintz-curtain-robed Ahmed, whose face behind the false beard and moustache and walnut stain was gray with fear, and Horrabin, bent way over forward to avoid brushing his hat against the roof stones, bringing up the rear on his stilts.
They fell on the two yuppies, slapped the scythes out of their hands, slammed them back against the bar, kneed them briskly in the privates, and then frog-marched them out.