[5][6] Peter Ndlovu is the club's top international goalscorer, netting 21 times for Zimbabwe during his tenure with the Blades.
[7] International call-ups during the earliest years of Sheffield United were generally for the home nations (England, Scotland, Wales and Northern Ireland.
However, there were growing calls for organised sports to be suspended in favour of the war effort and The Football Association duly halted all competitive fixtures from 1915, a cessation which remained in place until the commencement of the 1919–20 season.
Despite this a series of unofficial exhibition games were organised throughout the wartime period, with the details of Sheffield United's involvement listed below.
[100] Between 1899 and 1978 the four football associations of the UK undertook occasional summer tours, playing friendly fixtures against their host nations.