Factual error: Lieutenants Chard (Stanley Baker) and Bromhead (Michael Caine) and nearly all the soldiers defending Rourke's Drift are clean-shaven. Between 1860 and 1916 all British army personnel, from Field Marshall to Private were not allowed to shave their upper lips. The army rigidly enforced this rule. Thus, all the soldiers defending Rourke's Drift sported moustaches. Many had beards, too.
Rob Halliday
21st Aug 2022