Factual error: As well as the sergeant's stripes on his cuff, Sergeant O'Neil wears three pips on his epaulettes, which would indicate a much more senior rank and would not be worn together with the stripes.
Factual error: Victoria is referred to throughout the film as a 'state'. Since Australia did not exist as a unified country until 1901, there were no states at the time. Each was a separate 'colony' and would have been referred to as such.
Factual error: All four members of the Kelly gang wore helmets and armour in the final shootout, with long oilskin coats over the top.
Factual error: Ned Kelly was not clean-shaven as depicted, but had a full beard. A full beard is often still referred to as a 'Ned Kelly beard' in Australia.
Factual error: The film depicts a clash between the 'Irish' Kelly gang and the 'English' police. Constable Fitzpatrick is depicted as an upper-class Englishman (and describes himself as British). In reality, Fitzpatrick and most of the other policemen who came into contact with the gang were as Irish as the Kellys.